Dry eyes are a common problem that is usually due to the eyes producing too little tear fluid.
Anatomy of the eye
Glaucoma is an eye disease in which the optic nerve has been damaged as a result of increased pressure.
An outward-facing eyelid is a condition that usually affects older people as a result of reduced elasticity in the skin and connective tissue.
Keratoconus is an eye disease in which the cornea gradually becomes thinner and weaker and then can become peaky and cause severe astigmatism (refractive error).
Macular degeneration is an eye disease that involves age-related changes in the macula