Can RP lead to total blindness?
A majority of people with RP are legally blind by the age of 40. Legally blind individuals are those whose best visual sharpness or acuity (with glasses or contact lenses, if needed) is 20/200 or worse in their better eye; or whose visual field, regardless of acuity, is restricted to a 20 degree diameter (10 degree radius).
Blindness, to most people, means a complete loss of sight. As they grow older, some people with RP do become blind in this sense. However, many will retain a small amount of vision such as light perception. A majority of people with RP are legally blind by the age of 40. People who are legally blind usually maintain a good deal of functional vision supplemented by adaptive technology. Legally blind individuals are those whose best visual sharpness or acuity (with glasses or contact lenses, if needed) is 20/200 or worse in their better eye; or whose visual field, regardless of acuity, is restricted to a 20 degree diameter (10 degree radius).
