According to the CDC, the most common eye problems in the US are refractive errors, astigmatism, farsightedness, nearsightedness, and presbyopia. Others include Age-related macular degeneration (wet and dry) which damages central vision and is associated with aging. You need central vision to see objects clearly and to perform everyday tasks like driving and reading. Cataracts (cloudy lenses) are the leading cause of vision loss in America and the leading cause of blindness globally. Another common eye disease is diabetic retinopathy, a common complication of diabetes and the leading cause of blindness in American adults. The disease progressively damages the retina’s blood vessels, which are required for good vision. Glaucoma (open and closed-angle) damages the optic nerve and can lead to vision loss and blindness. The most common cause of vision impairment in children is amblyopia (lazy eye), where vision in one eye is reduced since the brain and the eye don't work together properly. Strabismus causes crossed eyes due to a lack of coordination between the two eyes such that the eyes are misaligned or look in different directions.