Which type of Usher's Syndrome progresses slowly and does not result in total blindness?

Usher's Syndrome is a genetic condition that affects both hearing and vision. It's classified into several types based on the severity and progression of symptoms. Type 2 Usher's Syndrome is characterized by moderate hearing loss at birth, with progressive vision loss that occurs more slowly than in other types. Individuals with Type 2 Usher's typically retain some degree of vision throughout their lives, and while they may experience changes in their vision, it does not lead to total blindness.

This distinctive feature sets Type 2 apart from Type 1 and Type 3, where the progression may be more rapid and often results in severe vision impairment or total blindness. Type 1 is usually marked by profound hearing loss and early-onset vision problems, while Type 3 presents a variable course, often leading to more substantial visual and auditory deterioration over time. Type 4 is not commonly discussed in the context of Usher's syndrome. Consequently, Type 2 fits the description of a slowly progressing condition that allows for the preservation of some vision.