Contact lens are thin, clear plastic disks you wear in your eye to improve your vision. Contacts float on the tear film that covers your cornea.
Like eyeglasses, contact lenses correct vision problems caused by refractive errors. A refractive error is when the eye does not refract (bend or focus) light properly into the eye resulting in a blurred image.
Contacts can improve vision for people with these refractive errors:
- myopia (nearsightedness)
- hyperopia (farsightedness)
- astigmatism (distorted vision)
- presbyopia (changes to near vision that normally happen with age)