Find out what 20/20 vision means, and how it compares to the other measurements of visual acuity.
Learn what you need to know about safety glasses and goggles, including details about protective eyewear standards.
The conjunctiva is the clear membrane covering part of the front of the eye and the inside of the eyelids. Learn more about the conjunctiva of the eye.
Omega-3 fatty acids play an important role in your overall health and may lower your risk of developing certain eye conditions.
Learn about the eye and vision benefits of lutein and zeaxanthin — and which foods are highest in these vitamins.
Gray eyes are very rare and can appear dark gray, gray-blue or gray-green in color. Gray eyes share some traits and may develop the same way as blue eyes.
Learn about the different eye tests eye doctors use in their offices — and download your own eye chart to use at home.
Click on various parts of our human eye illustration for descriptions of the eye anatomy; read an article about how vision works.
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.
A simple color blind test can detect color vision problems you may not be aware of. Learn about the different types of color vision tests and when to have one.
Need an eye exam ASAP? Not sure where you can get a walk-in eye exam? Not all eye care providers take walk-ins. Find out who does walk-in exams.
If your toddler’s eyes are swollen, it’s important to assess if the child is in need of medical attention or if home remedies will suffice.
The best eye doctor for you depends on what type of eye or vision problems you have or are at risk for. Compare and choose: optometrist vs. ophthalmologist.
Are your eye exams as complete as they should be? Learn about tests that commonly are included in a comprehensive eye exam.
Learn how baby vision develops during the first year of life, and how to spot eyesight issues in newborns and young children.
Hazel eyes are a mixture of 2 or 3 colors and can look different on each person. How does this rare eye color happen?
Looking for a free eye exam? Discover organizations that provide free eye exams and free glasses to families and individuals in financial need.
Guide to nutritional supplements for eye heath and good vision.