Vision Resources

Dogs see the world differently than humans do. Learn more about a dog’s color vision, night vision and visual sharpness.

Seeking to donate your old or unused eyeglasses? Lions Clubs, New Eyes and OneSight are among charities collecting used eyeglasses. You can drop old glasses in a bin at LensCrafters, Walmart or Sam's Club stores or mail them to VSP or New Eyes.

Learn about the eye anatomy and visual sharpness of eagles, how it compares to that of humans and if it is possible for people to have "eagle eye" vision.

Ever wonder why we roll our eyes? We roll our eyes for many reasons from annoyance to exhaustion but the gesture could have serious effects on relationships.

Why do we wink? What does a wink mean? Learn how and why we wink, the various meanings of a wink (flirty, fun and creepy) around the world and what to do if you’re winking uncontrollably.

Dogs can get pink eye from bacterial and viral catalysts, as well as allergies and injury, among other factors. See a vet immediately if you suspect your dog has pink eye.

Services and resources to help visually impaired veterans find the support they need to overcome challenges from blindness and low vision.

Learn how to adapt your home if you are visually impaired, including increased lighting, adding color contrast and avoiding patterns.

An in-depth, resource-packed guide for dealing with sensory overload if you have low vision.

Learn how to use free features on your computer, laptop or phone to make the internet more accessible with impaired vision.

Find out what it takes to qualify for Social Security disability benefits — including SSDI and SSI — if you’re dealing with blindness or low vision.

Poor eyesight or blindness are no reason to avoid traveling. Read these proven tips for planning and enjoying safe, enjoyable holidays.

A list of apps, organizations, schools, scholarships, products and other resources for the legally blind, as well as for their family and friends.

Caring for a blind dog can be a challenge. Take these steps to make life easier and more rewarding for a dog with low vision or blindness.

A little extra preparation can ensure your child thrives in their learning environment.

Optical illusions occur when the brain gets too much or too little visual information and makes a "guess" about how to interpret it.

Learn why your eyes look red in pictures but your pets' eyes glow, and read tips to prevent and remove the red-eye effect in photos.

Is love at first sight real? Scientists, poets and everyone in between have yet to come up with a concrete answer to this age-old question.

Our constant need to check social media has made eye contact difficult. Research shows eye contact is important in a conversation, why we avoid and even lay out rules for how to see eye to eye.

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There's a good reason the tear-jerking vegetable makes you weep.

All about the sclera of the eye, including scleral functions and problems such as scleral icterus (yellow sclera).

Learn about the uvea - the pigmented middle layer of the eye that includes the iris, ciliary body and choroid.

The retina is the sensory membrane that lines the inner surface of the back of the eyeball. It's composed of several layers, including one...

All about the pupil of the eye, including Adie's tonic pupil and other conditions that affect pupil size.

The cornea is the clear front surface of the eye. It lies directly in front of the iris and pupil, and allows light to enter the eye. The cornea has five layers. From front to back, these layers are...

All about the conjunctiva of the eye, including what to do about conjunctival pallor or injection.

Click on various parts of our human eye illustration for descriptions of the eye anatomy; read an article about how vision works.

The cells in your eyes use positive and negative afterimages to create mind-bending optical illusions.

Dog eye infections can be caused by a variety of factors, from allergies to trauma.

Several canine conditions require eye drops, from allergies and dry eye to infections and glaucoma.

Several conditions can cause red eyes in dogs, including dry eye disease, conjunctivitis, glaucoma and corneal ulcer.

Canine keratoconjunctivitis is a serious dry eye condition in dogs that causes insufficient tear production. If left untreated, it can even cause permanent blindness.

Learn the benefits of wearing a sleeping eye mask to bed, plus the different eye mask types and what to look for before you buy.

The macula (or macula lutea) is the most sensitive part of the retina. It’s responsible for visual acuity, central vision and color vision. Learn more.

How to protect your eyes during a solar eclipse. Includes video detailing what a solar eclipse is.

Driving with poor vision can have catastrophic consequences. Find out how you can improve your road safety with a few simple steps.

What part of the brain controls vision? Learn how the brain controls your eyesight and how vision is a complex function involving multiple brain lobes.

The best way to apply eye drops, including allergy eye drops and eye drops for dry eyes -- without getting them all over your face!

Erfahren Sie mehr über die Uvea oder mittlere Augenhaut – die pigmentierte mittlere Schicht des Auges, zu der die Iris, der Ziliarkörper und die Aderhaut gehören.

Your dominant eye is the one that provides a greater degree of input to the visual part of your brain. Try these easy tests to find your dominant eye.

Cats have a third eyelid (nictitating membrane) located in the corner of their eyes that provides protection and moisturization of the eyes.

A dog’s eye(s) can become swollen due to mild conditions like allergies, as well as serious diseases like glaucoma. Contact a vet if your dog’s eye is swollen.