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A comprehensive eye examination combines several tests that together assess vision and the health of the eye. It usually begins with a history of symp...

The prevalence of myopia has increased markedly over recent decades, most strikingly in urban East Asia, where a large majority of young adults in som...

Diabetic retinopathy is a leading cause of vision loss among working age adults, and it often causes no symptoms until it is advanced. Because treatme...

Floaters and flashes are among the most common visual symptoms, and both are usually related to the vitreous, the clear gel that fills the back of the...

Microbial keratitis, an infection of the cornea, is the most serious complication of contact lens wear. It is uncommon, but it can cause corneal scarr...

The tear film is a thin layered coating that keeps the surface of the eye smooth, moist, and protected. Its innermost component is a mucin layer produ...