The most common eye diseases include refractive issues, cataracts, glaucoma, amblyopia and strabismus, according to the CDC. The most common refractive issues are myopia, hyperopia, astigmatism and presbyopia.
A cataract is the hardening of the lens of the eye, making it difficult to focus. Glaucoma is the build-up of fluid in the eye that creates unsafe pressure, which damages the optic nerve. Amblyopia, or lazy eye, is due to the eye and brain not working together properly. Strabismus is an imbalance of the position of the eyes. Myopia and hyperopia are near-sightedness and farsightedness, respectively. Astigmatism and presbyopia involve blurry vision at all distances. Each of these common eye diseases is diagnosed and treated with regular visits to an eye doctor.