What is retinitis pigmentosa?
Retinitis pigmentosa is actually the name given to a group of hereditary eye disorders, all of which involve the eye's retina, the light-sensitive nerve layer that lines the back of the eye, and all of which cause a gradual, yet progressive, loss or reduction in visual ability.

What causes retinitis pigmentosa?
Retinitis pigmentosa is caused by a variety of different inherited retinal defects - all of which affect the ability of the retina to sense light. The retinal defect may be found in the retina's rod cells (a type of retinal cell found outside of the central portion of the retina that help to transmit dim light and allow for peripheral vision), the retina's cone cells (a type of retinal cell found inside the center of the retina that help to transmit the color and detail of images), and/or in the connection between the cells that compose the retina.

What are the symptoms of retinitis pigmentosa?
The following are the most common symptoms ofretinitis pigmentosa. However, each individual may experience symptoms differently, especially with severity and progression as the most obvious variables. Some persons with retinitis pigmentosa experience a slow, very progressive loss of vision, while others lose their visual ability much more quickly and severely. Other common symptoms may include:

• difficulty seeing in poor light (i.e., at dusk or in a dimly lit area) or in the dark
   
• a diminished visual field, either central vision (a condition called macular dystrophy) or peripheral vision (sometimes referred to as tunnel vision)
   
• difficulty reading print (with a loss of central vision)
   
• difficulty deciphering detailed images (with a loss of central vision)
   
• difficulty with stumbling or tripping over objects not seen; clumsiness (with a loss of peripheral vision)
   
• glare

The symptoms ofretinitis pigmentosa may resemble other eye diseases. Consult a physician for diagnosis.

Treatment for retinitis pigmentosa:
Specific treatment will be determined by your physician(s) based on:

• your age, overall health, and medical history
• extent of the disease
• your tolerance for specific medications, procedures, or therapies
• expectations for the course of the disease
• your opinion or preference