HEALTH TOPICS 
Retinitis Pigmentosa
What Is It?
Retinitis pigmentosa (RP) is an eye disease. It leads to gradual loss of vision and, sometimes, blindness.
RP occurs when the light-sensing cells in the eye break down. These cells, called rods and cones, are located in the retina. This is the back portion of the eye that receives light coming into the eye, and sends that visual information to the brain.
To continue reading this article, you must log in.
Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.
- Research health conditions
- Check your symptoms
- Prepare for a doctor's visit or test
- Find the best treatments and procedures for you
- Explore options for better nutrition and exercise