Causes
Many types of RP are caused by a genetic mutation. Some cases occur sporadically. Vision loss occurs when light-sensitive cells in the retina gradually break down. There are two types of cells in the retina:
- Cones—These cells are found mostly in the center of the retina. Cones are needed for central vision and to see colors.
- Rods—Located mostly away from the center, rods respond to dim light. They provide night and peripheral vision.
In most forms of retinitis pigmentosa, the rods die. Vision, thus, becomes impaired at night. The ability to see things off to the side while looking ahead also decreases. In some forms of RP, the cones are lost. In those cases, central and color vision suffers. Vision loss usually progresses over a period of many years.
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition. Copyright © 2012 EBSCO Publishing All rights reserved.
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