Overview
Oligocone trichromacy (also sometimes called oligocone trichromacy syndrome) is a rare inherited eye condition that affects the cone cells in the retina — the light-sensitive cells at the back of the eye that allow you to see color and fine detail. In this condition, the number of working cone cells is greatly reduced, even though all three types of cones (red, green, and blue) are still present. This is what makes it different from color blindness, where one type of cone is missing or not working properly. Because there are fewer cones than normal, the brain receives less visual information, leading to reduced sharpness of vision and difficulty seeing in bright light. People with oligocone trichromacy typically notice problems from early childhood. The main symptoms include reduced visual sharpness (called low visual acuity), sensitivity to bright light (photophobia), involuntary eye movements (nystagmus), and reduced color discrimination despite technically having all three cone types. Vision in dim light is usually much better than in bright light, which is the opposite of what most people experience. There is currently no cure for oligocone trichromacy. Treatment focuses on managing symptoms — for example, using tinted lenses or sunglasses to reduce light sensitivity, and optical aids to help with low vision. Regular monitoring by an eye specialist is important. The condition is generally stable and does not tend to get worse over time, which is reassuring for many patients and families.
Also known as:
Key symptoms:
Reduced sharpness of vision (low visual acuity)Sensitivity to bright light (photophobia)Involuntary, repetitive eye movements (nystagmus)Difficulty telling colors apart despite having all three cone typesBetter vision in dim or low light than in bright lightReduced ability to see fine detailsGlare sensitivityDifficulty reading small printSquinting or closing eyes in bright environments
Clinical phenotype terms (2)— hover any for plain English
Autosomal recessive
Passed on when both parents carry the same gene change; often skips generations
Infantile
Begins in infancy, roughly 1 month to 2 years old
Treatments
No FDA-approved treatments are currently listed for Oligocone trichromacy.
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Specialists
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Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to Oligocone trichromacy.
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Caregiver Resources
NORD Caregiver Resources
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Mental Health Support
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Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.Which genes should be tested to confirm the diagnosis, and what does the result mean for other family members?,Will my vision (or my child's vision) get worse over time, or is it expected to stay stable?,What type of tinted lenses or low vision aids would be most helpful?,Are there any clinical trials or research studies we could participate in?,What accommodations should we request at school or work?,Should other family members be tested for this condition?,Are there any specialists or low vision centers you would recommend for ongoing care?
Common questions about Oligocone trichromacy
What is Oligocone trichromacy?
Oligocone trichromacy (also sometimes called oligocone trichromacy syndrome) is a rare inherited eye condition that affects the cone cells in the retina — the light-sensitive cells at the back of the eye that allow you to see color and fine detail. In this condition, the number of working cone cells is greatly reduced, even though all three types of cones (red, green, and blue) are still present. This is what makes it different from color blindness, where one type of cone is missing or not working properly. Because there are fewer cones than normal, the brain receives less visual information,
How is Oligocone trichromacy inherited?
Oligocone trichromacy follows a autosomal recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Oligocone trichromacy typically begin?
Typical onset of Oligocone trichromacy is infantile. Age of onset can vary across affected individuals.