Have you ever wondered why some people become nearsighted? Lack of time in the sun may be to blame.

Want to save a little money by taking an online vision test instead of seeing the eye doctor? You may be disappointed with your new eyeglass prescription.

How is your vision? Find out how eye doctors determine if you have 20/20 vision.

Do you have 20/20 vision? You might never have known about these important numbers if the eye chart hadn't been invented.