There are several possible causes of strabismus, including weak eye muscles, heredity, cataract and nerve conditions. Strabismus that develops early in childhood and is constant needs to be corrected surgically.
Glaucoma is an eye condition where there is buildup of pressure in the eye, resulting in damage to the optic nerve. The optic nerve is the cable of the eye that carries images from the eye to the brain. This results in vision loss.
Age-related macular degeneration (AMD) is one of the leading causes of severe, irreversible vision loss in the world. It usually affects people aged 50 years and above as a natural result of aging. The cells in the macula become damaged and stop functioning effectively.