A Genetic Breakdown of Sight
Retinitis Pigmentosa (RP) is a group of rare, inherited genetic disorders that involve a slow, progressive breakdown of the light-sensitive cells in the retina.
The retina is lined with two types of cells: Rods (which process dim light and peripheral vision) and Cones (which process sharp central vision and color). In RP, the genetic mutation almost always attacks the rods first. Over years or decades, as these cells degenerate, dark pigment deposits begin to accumulate in the retina, giving the disease its name.
Genetics & Demographics
RP is profoundly genetic, linked to mutations in over 100 different genes. The severity and speed of progression depend heavily on how it was inherited (autosomal dominant, autosomal recessive, or X-linked).
Does it affect a specific race? No. RP affects people of all races, ethnicities, and genders equally across the globe (roughly 1 in 4,000 people). While specific gene mutations may cluster within certain families, the disease itself does not discriminate by demographic.
Important: Because it is a hereditary disorder, if one person in a family is diagnosed with RP, we strongly recommend that all siblings and children undergo a comprehensive dilated eye exam.
Disease Progression
The Stages of Vision Loss
RP typically follows a very specific pattern of visual decline over decades.
Early: Night Blindness
Childhood / Young Adult
The very first symptom is usually Nyctalopia (night blindness). Patients find it incredibly difficult to see in dim lighting, such as navigating a dark movie theater or walking outside at night. It takes an abnormally long time for their eyes to adjust to the dark.
Mid: “Tunnel Vision”
Adulthood
As the rod cells die, the patient slowly loses their peripheral (side) vision. They begin tripping over objects, bumping into doorways, and losing their ability to drive safely. Eventually, their sight constricts down to a small, central “tunnel.”
Late: Central Loss
Later Life
In the final stages, the disease attacks the cone cells. Central vision becomes blurry, and color perception is lost. While some patients retain a tiny window of sight, many progress to legal or total blindness.
Clinical Care
Diagnosis & Collaborative Management
While there is currently no cure for most types of RP, accurate diagnosis and proactive management are crucial.
The Diagnostic Frontline
Visual Field Testing
Dr. Fouladian utilizes computerized Visual Field perimetry to precisely map your peripheral vision. This is the gold standard for tracking how quickly the “tunneling” is progressing year over year.
Optomap® Imaging
Using ultra-widefield imaging, we can document the physical “bone-spicule” pigment changes happening in the far periphery of your retina to confirm the diagnosis without invasive procedures.
Specialist Co-Management
- Genetic Testing & Gene Therapy We refer our RP patients to Inherited Retinal Disease Specialists. Identifying your exact genetic mutation is vital. Today, there are FDA-approved gene therapies (like Luxturna) specifically for RP caused by the RPE65 mutation, and many more are currently in clinical trials.
- Low Vision Rehabilitation As your visual field constricts, we will connect you with Low Vision specialists who provide optical devices, telescopic lenses, and mobility training to help you maintain your independence for as long as possible.
- UV Protection Dr. Fouladian will prescribe specialized absorptive lenses (often amber or red-tinted) to maximize contrast, reduce crippling glare, and protect the fragile remaining cells from toxic UV light damage.
Expert Guidance & Support
A diagnosis of Retinitis Pigmentosa is life-changing. Schedule a comprehensive evaluation with Dr. Fouladian to discuss your imaging, visual fields, and the referral process to top-tier specialists.
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