Eye Conditions Associated with Blindness T-Z

Trachoma

What Is Trachoma? Trachoma is, according to Trachoma.org, the world’s leading infectious cause of preventable blindness. It is a contagious infection of the eye’s conjunctiva (transparent, delicate lining of the eyeball and eye lids), caused by the bacteria Chlamydia trachomatis, and spread by contact with an infected person or infected flies. Its presence scars the surface […]

Usher Syndrome

What Is Usher Syndrome? Usher syndrome is a hereditary syndrome characterized by hearing loss and retinitis pigmentosa (RP). Hearing loss may range from profound at birth (Usher syndrome Type 1), to moderate to severe (Usher syndrome Type 2), or may be absent at birth but decline over time (Usher syndrome Type 3). Retinitis pigmentosa, affecting […]