Face Shape Guide For Sunglasses

Face shapes play a pivotal role in how you look wearing your sunglasses. There are literally thousands of sunglasses on GKB Opticals and with so many designs from the different brands, it’s hard to choose your favorite. If you’re looking out for sunglasses, here’s the perfect guide for you to pick up your sunglasses according to your face shape. But firstly, here re the most dominant face shapes: Oval, Round, Heart, Square, Triangle and Diamond.

Sunglasses for the Oval Face Shapes:

Oval face shape Is really versatile and most sunglasses look lovely on their face. If you have an oval face shape, you’re lucky to be able to flaunt any type of sunglass style. Choose from aviators, wayfarers, wraparounds, square, oversized, cat eyes, clubmasters and many more.

Sunglasses for the Round Face Shapes:

A very common face shape, round faces look great with angular designs of sunglasses. The aim here is to reduce the amount of fullness and create lines and angles on the face. Cat eye sunglasses and oversized angular sunglasses shapes go well with this face shape. Avoid wearing round sunglasses as all costs.

Sunglasses for the Heart face shapes:

The main distinctive character of a Heart face shape is a wider temple area and a thinner and narrower chin area. This makes it essential to choose a sunglass design that has less amounts of angles like round sunglasses, oversized ones or Cat eyes with soft angular designs.

Sunglasses for the Square face shapes:

Those who have square face shapes have the same width at their temple region as well as jaw, making them look kind of square and angular. The best way to make square face shapes look less square is to add sunglasses like oversized, wayfarer or cat eye sunglasses to soften the look.

Sunglasses for the Triangle face shapes:

For the triangular face shape which has a pointed narrow chin and wide temple, browline sunglasses have been considered the best , since they create an illusion of a shorter face with the sunglasses temple section forming a straight line along the wearer’s brow region.

Sunglasses for the Diamond face shapes:

Diamond face shape is quite uncommon and is really narrow at the chin and usually their temple region is the widest. These face shapes will look best in wayfarers and cat eye sunglass styles which create an illusion of a balanced temple and jaw.

Irrespective of what face shape you have, it’s always great to experiment and try on different styles to know which one you are most comfortable in. There are many designs of sunglasses available on www.gkboptical.com and you can even try them on before purchasing using our try on tool. You can even consult with our optical assistants who can guide you with choosing a perfect design for you over chat, phone or email. So, happy sunglasses shopping and do enjoy your new sunnies.

April 11, 2016June 23, 2016

Steps To Choose our Eyeglasses Properly

Eyeglasses are no longer uncool, they are one of the most trendy accessories of the young and hip generation. Eyeglasses are very versatile with many designs and metals being used to create these stylish accessories, it’s definitely easy to get confused about what style or design one should go for. Clearly, many prospective buyers go through a lot of pain in selecting their perfect frames and sometimes even settle for whatever their optical store salesman hands them. But today, we offer you an extensive guide so as to ease your problems.

Step 1: Determine your face shape

You might feel strange when we put importance to recognizing your face shape, but it’s the first step towards choosing an eyeglass that’s worth your time and money. So, before even checking out eyeframes, decide what type of face you have. Here are the most common ones: Round, square, oblong, heart, diamond, rectangular, oval and many more. You can check out our face shape guide for details on how to determine your face shape.

Step 2: Determine which Frame Shapes Look Best for Your Face Shape

Whether you’re a first time wearer or purchasing a replacement or additional glasses, always choose a frame that’s marked as compatible with your face shape. Noone wants to look strange wearing their glasses. Skip round frames if you already have round face shape, if you have a square face shape, avoid thick square frames which make you face look more square. All of our eyeframes come with indicators which display the ideal face shapes for each frames, so take note and choose accordingly.

Step 3: Determine the Frame Material& Size

Eyeglasses frames are made from different materials like metal. Titanium, shell, plastic and more. Some even have speailjewellery like designs wth precious metals or rhinestones on them, some can even come with diamonds studden in their eyeframes, so choose wisely. For a more durable eyeframe that is also very lightweight choose Titanium eyeframes. Shell eyeframes and plastic eyeframes come in a variety of colors and designs. Also it’simportanct to know which frame sizes are required for your face shape. Most faces suit medium frmae sizes but you can check out your esictingeyeframe for the dimensions and compare with the eyeframes on GKB Opticals for the best fitting.

Step 4: Choose your Frames design

Eyeframes are mainly categorized by their frame designs which include Full rimmed, Half rimmed and rimless eyeglasses . Full rimmed styles are most common and are safe if you’re always dropping or mishandling your glasses. The frame protects the lens , but it also creates a line around your vision and can change your looks. Half rimmed or semi rimless ones have a rimmed upper portion (viz. the temple) but don’t have rimmed lower portions, making them more comfortable and easier to own. Rimless eyeframes are the least obtrusive and can be really lightweight too. But they also come with chance of damage to the lens by accidentally dropping the lenses.

Step 5: Decde upon the Brand

At the GKB Opticals online catalog, you will find numerous branded spectacle frames that you won’t find anywhere else. Choose from high end brands like Ray Ban, Oakley, Vogue, Tommy Hilfiger, Prada, Gucci, Versace and more. You’ll also find affordable spectacle eyeglass frames from Lance Bremmer, Inspira and Legacy. Browse through the catalog, use the panel on the left side to refine your search. You might just get some extra discounts and deals too, just check out the online store or ring us at 1800 419 1990 for any queries and to know about special offers and promotions(If any).

Step 5: Choose your lens package

If you’re getting lenses without power you will need ‘Plano Lenses’ , if you have single vision, rhen thee are nuktiple lens packages for you. If you require bifocal lenses, you will again have a few choises to make . Also there are hhigh index lenses, progressive lenses and many, many more. So if you’re stuck or confused with what lenses to choose let our customer support guide you through the purchase.

Step 6 : Try on Eyeframes using Virtual Try on Tool

It always makes sense to try out how your eyeglasses look before you place the order, so make use of GKB Optical’s online virtual try on tool and see how your chosen eyeframe looks on your face. Upload or click your photo using your webcam ; or you can also choose a model face similar to your face shape to try on the eyeglass.

Step 7: Finalize & Checkout

After you’re sanguine that your selected frame is Ok, Upload your prescription, or let our customer care executives guide you through the next phrases. Add your lens order or get your eyeframes only, and pay for your order. In a few days, you will receive your eyeframes at home.

March 24, 2016June 23, 2016

How Computer Glasses Work – An Overview

Computer glasses are special glasses that are designed to provide the eyes comfortable vision while working on digital devices like laptops and desktops. Advancement of technology has made computers and laptops a part of our daily life and has become inevitable at our workstations too.

Computer glasses are mostly designed to eliminate the harsh lights emitted from the backlit screens used in digital devices such as desktops, laptops, tabs and mobile phones. Every day while we are busy at working on the digital screens or mobiles we don’t feel that we’re causing discomfort for our eyes. Eyes are really active organs which constantly work to provide us the clearest vision and give our brains the information to work properly.

When we work on digital screens we force our eyes to readjust focus on what’s in front constantly. When we shift from pictures to text our eyes quickly adjust focus to keep the text in focus. Our eyes also keep adjusting the focus while we shift between the keyboard and screen. Also improper lighting can aggravate the problem.

The main problem for people working on digital devices for extended period is the aftereffects and eye problems faced while working. The most common symptoms of eye problem resulting from use of computers and digital devices are known as Computer Vision Syndrome or CVS.

The main problems experienced in CVS headaches after using digital devices, blurry vision, neck pain , eye strain, eye redness, fatigue, dry eyes, irritation in the eyes, vertigo or dizziness, double vision, polyopia and problems in refocusing the eyes.

The scary fact is that National Institute of Occupational Safety and Health has shared their findings that about 90% users, who spend 3+ hours before a computer, will face some symptoms of CVS. One of the main problems faced during using a digital device is the reflections and excessive blue-violet lights. Also when we read our eyes blink fewer times, causing straining in our eyes and also causing dry eyes. So, it’s really important that one uses some kind of eye protection to reduce the eye problems associated with computer vision syndrome.

The Best way to reduce eye problems and increase your chances of keeping your eyes unaffected from the harsh lights from computer screens, computer glasses are the best solutions. Computer glasses are really useful to keep eyes more relaxed and feeling easy while you work on the computer. These glasses are specially tinted to reduce the amount of light passing to your eyes which reduces the eye fatigue. Also computer glasses come with an anti glare coating which is said to reduce the unnecessary reflections and block excessive lights, also causing eyes to feel more relaxed.

Computer glasses are formulated to block and reduce the amount of light that enters our eyes. Blue light focuses in front of the retina and forces our eyes to constantly shift it’s focus to keep the object/ text/ image in front in focus. This makes it tough for our eyes to keep up and causes fatigue. So, wearing a specially crafted computer glass eliminates the constant need to keep focusing and reduces fatigue.

So if you’re spending more than three hours in-front of a computer or digital screen opt for computer glasses and reduce your eye straining and fatigue.

March 14, 2016June 23, 2016

Beat The Heat With Cool Offers from GKB Opticals.

GKB Opticals, India’s premier Eyewear destination presents a wide array of offers for our customers to beat the Summer heat. So, visit your nearest stores or shop online to get the best deals and offers . Summer season has arrived and the heat has been soaring!

This summer if you’re purchasing a spectacle, don’t go anywhere else! Visit GKB Opticals for attractive offers on eyeglasses, sunglasses and Contact lenses. With a wide range of latest designs, you will definitely find a design that suits your needs and matches your persona.

GKB Opticals believes in personalized care. Step into a store or log onto the website for the personalized eyecare experience. You can also avail a lot of offers both online and offline. With thousands of designs of Spectacle frames and many lens packages to suit your needs and budget it’s easy to get your new spectacles done without stepping out into the sun through www.gkboptical.com.

Summer requires the additional care for your eyes , with sunglasses that can protect your eyes from potential harm like UV damage, sunburn, temporary Photokeratitis etc. This can be avoided with proper sun protection. Sunglasses from affordable and premium brands are available from GKB Opticals.

Choose from stylish aviator sunglasses, wayfarer, clubmasters sunglass, oversized sunglasses and more at affordable prices. The best option might be to get Rx Sunglasses done with your prescription so that you see clearly throughout the day, even when you’re out in the sun. Now you can get your Rx sunglasses done at a discounted price with the ‘Beat The Heat’ offer from GKB Opticals. Buy premium eyeglasses in square, oval half rimmed, rimmed and rimless designs. Also checkout the wide range of titanium and lightweight frames from GKB .

Buy your spectacle; choose to get lenses done along with your Eyeframes from In house brands and get great add-on offers for your next purchase. For a total lens and eye frame combo without offers you can get upto 30% off on your next purchase.

For branded Eyeframes and lens combo customers can avail upto 15% off on their next spectacle frame purchase, provided they’re getting complete spectacles done. Also there’s a choice to get 15% off on branded Rx Sunglasses. For Oakley or Ray Ban, customers can avoid 10% off on their Rx Sunglass purchase.

For in house brands like Legacy, Inspira and Lance Bremmer Eyeframes, when purchased along lenses customers can get Sundrive sunglasses for free; they only pay for the lenses. Also as an alternative, customers can avail 30% off on Eyeframes when they purchase complete spectacles.

For contact lens purchase above Rs 2000, customers can get 25% off on plano Sunglasses from Sundrive.

Offer starts today, so go get your new Eyeglasses and sunglasses done from GKB Opticals and enjoy exciting discounts.

March 8, 2016June 23, 2016

Tips for Protecting Your Glasses

Your glasses are important and whether or not you wear them daily, it’s required that you keep them safe. Eyeglasses can wear off with regular wear and tear and both the Eyeframes and lenses can get damaged with regular use. Lenses can get scratched with regular usage from things like clothes, dust etc and from other mishaps. Also if not stored properly it can get scratched from foreign objects which are stored together. This makes it important to keep it safe throughout the day.

Here are the steps you should take to keep your glasses protected everyday.

Step 1: Keep Your Glasses in A Case

We all know that keeping spectacles open or in a space where it can come in contact with sharp objects is not at all advisable, but we mostly disregard this. Sometimes we keep spectacles in bags or purses or in pockets, forcing them to get scratched by items like keys, coins, pens and many more things. IF you wear polycarbonate lenses with coatings, this will make visible scratches on your lens surface and damage your lenses over time. Scratches damage the coatings like UV coatings, dust free or water resistance coatings and create disturbing scratches on the surface. Glass lenses show more resistance to scratches but nonetheless keeping them safe in a box is required. Always use spectacle cases for your eyeglasses when they’re not in use.

Step 2: Clean properly

Another mistake that most spectacle wearers make is not using appropriate cleaning solutions and soft cloth for cleaning lenses. Everyone has at least once used their clothing’s to clean their glasses on the go, since they got soiled or needed immediate cleaning. But lenses can get damaged when proper cleaning solutions or cleaning cloth is not used. It’s advised to use either lint free clothes or microfiber cloth to clean the lenses.

Also use proper solutions for cleaning the lenses like lens cleaning solutions meant to be used for lens cleaning. Or use plain water to wipe off the dust particles in running water and wipe gently with a microfiber cloth.

Step 3: Know When to Replace your Lens or Frame:

It’s necessary that you know when to replace your lenses or frame. Lenses and frame both get worn out with regular use and it’s necessary that you know when to replace your lenses. The time to change your lenses can be when your lenses get scratched too much or if they start developing cracks. Sometimes your visit to the doctor might indicate that your prescription has changed. For spectacles frames, when your frames show signs of damage like peeling, or breaking of parts, or damage to the nose bridge or the temples, you might want to get a new pair as soon as possible.

It’s easy to change your lenses or frames; you can do it at a shop or buy it online. For online purchases, you can choose www.gkboptical.com and choose from a wide variety of 1450+ frame designs and many lens packages to suit your needs and budget. You can choose from designer Eyeframes or simple affordable eyeglass frames whichever your requirement is. You can also choose between full rimmed, half rimmed or rimless Eyeframes depending on your face shape or the look you personally prefer.

You can get rimless frames if you’re looking for a clean look where your glasses create the least obstructions. These frames also are quite weightless so you’ll feel as if your spectacles have lost weight. Rimmed frames offer a change in your look and give you a more polished professional look. Whereas full rimmed frames help to give you a differen look altogether.

No matter what frames or lenses you get, it’s important to get scratch resistant lenses to reduce lens damage. Also don’t take your glasses near high heat or very low temperatures where it can function properly. So these are some ways by which you can make your eyeglasses stay in great shape for a longer period.

March 2, 2016June 23, 2016

Fun facts about human eye

Eyes are precious organs and more often than not people forget to take proper care of their eyes. Until and unless we face any eye problems we hardly give proper care for our eyes. Our eyes are amazing organs and there are some amazing fun facts about eyes that can make your wonder!

Fact 1:

We all know eyelashes keep eyes safe from dust and dirt but did you know that the average life span of eyes is about 5 months. Also, did you know that the length of the eyelashes shed by a human all throughout his life is more than 98 feet.

Fact 2:

Eyes stay the same size from your birth to your death. But your nose and ears don’t stop growing.

Fact 3:

All our muscles are made from tissues that contain blood vessels and need blood to Do you know that corneas are the only tissues that don’t have blood.

Fact 4:

Our retinas perceive the outside world as upside down and the images in our retina are split in half as well as distorted; it’s our brain that constantly keeps on working to keep these distorted and upside down images create our vision.

Fact 5

Humans originally had brown eyes; the blue eyes came as a mutation around 6000 years ago. The rarest eye color is green.

Fact 6:

If you have blue eye color, you can be linked to a single ancestor with who all other blue eyed people across the world share a link.

Fact 7:

Fingerprints are unique and are used widely for identification. A fingerprint has 40 unique characteristics but a retina has 256. This is the reason why increasingly retina scans are being preferred over fingerprint scan for identification.

Fact 8:

80% of all eye problems in the world can be avoided or treated if diagnosed in time or if they get adequate vision correctors. Eyes are known to heal really quickly and it’s been proved that it can repair minor corneal scratch in less than 48 hours. With proper care and vision aid, eyes can perform well and stay healthy. To keep eyes healthy, proper eye checkup is essential. If vision correction is required for refraction problems like myopia, presbyopia, astigmatism etc one can get spectacles or eyewear as required after consulting with an eye specialist.

Fact 9 :

It’s not possible to transplant a whole eye, since more than 1 million nerve fibers connect the eyes to the brain. When people talk about eye transplant, they are actually talking about transplant of the cornea. Medical science has not yet figured out a way to reconstruct the nerve fibers that connect the eyes to the brain.

Fact 10:

An eye is constructed of more than two million working parts which provide our eyes the ability to see properly. It is also the most active muscles in our body and do not rest while we’re sleeping too.

Hope these interesting facts will make you understand how much our vision is worth and how much we neglect our eyes. Take care of your eyes; use protective eyewear and vision correction as and when required.

January 27, 2016

Computer Glasses: Why they are Essential For Today’s Generation

Computer glasses or Computer spectacles are really popular among the modern generation. Computer screens have become a part of our daily workplace and our personal lives too and we spend hours before it, doing work, viewing pictures, browsing the internet and much more. This dependency has not been beneficial for our eyes as such. Today, most people use digital devices like smart phones, tablet computers, desktops, laptops and more. The slowly increasing dependency on these digital devices has made it impossible to avoid being affected by the effects of digital screens.

The more hours we spend before these screens, the more our eyes are stressed out and fatigued. Constantly looking at digital screens make eyes work even harder to focus on the on-screen object. The main culprit here is the prevalence of blue light rays that make eyes tired easily and also cause eye fatigue and eye problems.The Blue lights emitted from the computer screens can be reduced by using specially designed spectacles or computer eyeglasses for computer usage. These eyeglasses mostly come with two features that are essential for optimal protection against eye stress.

Anti Reflection lenses are used in case of Computer glasses since the reflections from computer screens can make it even harder for eyes to focus, resulting in eye fatigue. Also these glasses come with tinted lenses. Depending on the brand, the tints can be different as the tints can be of different colors, but the tinted glass helps with minimizing the effects of blue light on the eyes.

To keep eyes protected it’s wise to resort to computer glasses even though one might not need glasses for daily chores. Using computer glasses shields eyes from eye stress, fatigue, straining and other eye problems. So it’s wise to start early and use glasses to reduce eye stress, making it wise to resort to computer glasses irrespective of age or usage. It’s always better safe than sorry, so the best option is to opt for computer glasses from the start and reduce the effects of computer on eyes.

The various problems faced by computer users is called as CVS or Computer Vision Syndrome .

What is Computer Vision Syndrome:

Working on computer screens demands that we keep coordinating between the keyboard and the screen in a quick and repetitive motion. This repetitive effort makes our eyes work harder to regain focus every time we shift from keyboard to the screen.. This repetitive motion of adjusting focus makes our eyes develop strain and fatigue. This becomes tougher with the advancement of age since after 40’s, eyes lose the flexibility to focus at objects as easily as before.

The problems arising from computer usage is generally labeled as CVS or ‘Computer Vision Syndrome’, and even children working on digital screens for long hours are affected by CVS.
The eye strain arises from constantly shifting focus from the keyboard onto the screen and the text/image. This repetitive action makes eyes tired easily and more susceptible to get eye problems later on in an advanced age, much earlier you naturally would have developed eye problems.

Backlit Screens emit high amounts of blue light that makes eyes tired easily. Everyday exposure to this blue light can damage eyesight over time and stress eyes. On digital screens, eyes have to work harder to keep the object in focus and adjust to its contrast and brightness. This creates eye fatigue and strain which makes working on computers tougher for older adults.

So, to avoid these problems the best solution is to use Computer Glasses that offer Anti Reflection benefits which reduce the glares and reflections from the backlit screens. Also specially tinted lenses make it easier to look at blue light emitting screens for longer since they cut out the blue lights. For more information and help in buying Computer Glasses, call GKB Optical customer care experts at 1800 419 1990.

January 15, 2016January 13, 2016

When Is The Right Time To Replace Your Eyeglasses

Eyeglasses or Spectacles might be one of the most popular and easy to use vision corrector but they are also prone to daily wear and tear. Many of us are aware of the importance of getting the eyes checked periodically and getting the right spectacles made for ourselves. But there are many people who do not know when they should stop using their existing spectacles and opt for a new one. Here are the clear signs which mean you need to change your spectacles right now!

When Is The Right Time To Replace Your Eyeglasses – The Right Time To Replace Your Eyeglasses :

There are some clear signs that can help you decide whether it’s time to toss out your old spectacles and get a new pair. We list them one by one:

Frame: You’ve been wearing your spectacles for quite a long time and your spectacle frame has become soiled or discolored. If you’re a daily eyeglasses wearer even titanium frames will slowly get damaged with daily wear and tear. So, keep a close lookout on the color, frame shape and fittings of your glasses. Sometimes you can get your frames re-fitted if the hinges become loose, but if they are beyond repair, check out a new pair. If your frame has nose pads and supports, check from time to time if they are in good shape, if you see them getting damaged it’s time to pick up a new frame. You can go for a wide range of frames .
Change in Prescription: If you’ve been told that your prescription has changed you will need to get new lenses done, which will mean throwing out the old lenses and sometimes even the frame. While you get new lenses done, chances are they will look better in a new frame, or better still, go for rimless ones that give better obstruction free vision. They are also aesthetically pleasing so they’re for the ones who don’t want to change their appearance
Lens Damages: Everyday our lenses accumulate dust and dirt particles and if wiped without proper care, these harsh particles can damage the coatings on the lenses and create unpleasant scratches on the lens surface. Even with regular storage and traveling, scratches become inevitable. Scratch Resistance coatings reduce the amount of scratches but they also get damaged with time. So if you’re feeling disturbed with the scratched lenses that are blocking your vision it’s time to toss your existing lenses or the eyeglasses and get a new spectacles done.
Trends and Fashion : Being aware of current eyewear trends is important if you want to look classy and well put together. Following latest eyewear trends need not mean changing your eyeglasses every week, but you can easily change them once in awhile or have two or more done to compliment your common dressing styles. So if you are still wearing frames that go back 5 years, check out some trendy new designs. There are a lot of contemporary, classy and colorful frames available online making it easier to pick a style that’s just right for you.

So, now that you know when you should replace your eyeglasses, get some new ones done through GKB Opticals. Shop eyeglasses from a great range of trendy spectacle frames for any age, preference and budget and choose from the most affordable as well as premium brands. Enjoy supreme quality, fast shipping, free returns along with top class customer support for the smoothest online eyewear shopping experience.

January 11, 2016

Follow Us On Facebook and Enjoy Additional Benefits on GKBOptical.com

Hello,

Planning on Buying some new Eyewear ? Looking for ways to save on your eyewear purchase ? If you’re looking to get special offers and savings on your purchase from GKB Opticals, there’s good news for new GKB Opticals Facebook Followers. If you’re still not following us on Facebook, just hit the Like Button and Like GKB Opticals Facebook page to enjoy additional benefits while you shop on www.gkboptical.com

Like GKB Opticals Facebook Page & Get Great Offers

GKB Opticals has some really affordable eye frames and sunglasses on offer . There are affordable eyeframes within everyone’s budget starting from Rs 336 only. Also keeping up with the demand for Premium Eyeglasses, GKB Opticals also hosts a wide variety of international brands like Lance Bremmer, Ray Ban, Porsche, Prada, Emporio Armani, Tag Heuer , Tommy Hilfiger, Cartier, Oakley, Boss Orange, Police and more .

Find the exclusive Sunglasses range starting from Rs 249. Get quality affordable products and the best brands at one place through GKB Opticals website. You can take your pick from premium brands like Ray Ban , Oakley, Vogue, Maiu Jim, Burberry, Bvlgari, Carrera, Emporio Armani, Guess , Gucci and so more. You’ll be spoilt with choices from exclusive brands and designs that suit your lifestyle and personality , under a single website .

Get Power Sunglasses customized specially for your vision needs and enjoy superior vision without compromising on Sun Protection. Get the best of both worlds with Polarized Power Sunglasses that give your eyes better vision, clear visuals and sun protection too.

Now, if you’re looking for some addtional benfits while you shop for your favorite eyewear on GKB Opticals, just head over to our Faceook Page and like us. To receive your benefits just Mail us at cs@gkboptical.com or call us at 1800 419 1990 for additional support and queries. Enjoy all of these benefits and more, with GKB Opticals superior customers support and fast shipping.

January 1, 2016December 30, 2015

Facts about Astigmatism and Toric Lenses

Astigmatism is , similar to nearsightedness or farsightedness, a refractive error. A refraction or refractive error is when there is an error in focusing of light by the eye. Usually light focuses on a single point on the retina to produce clear pictures but in an eye affected by astigmatism light does not focus on a single focusing point on the retina. In eyes affected by astigmatism, light may get focused on multiple points , creating blurry vision.

Astigmatism and Toric Lenses

Let’s see what Astigmatism is how you can see betetr if you have Astigmatism with Toric Lenses .

Continue reading “Facts about Astigmatism and Toric Lenses”