Rod-cone dystrophy describes a specific sequence of retinal degeneration: the rod photoreceptors, responsible for vision in dim light, deteriorate first, and only later do the cone photoreceptors — responsible for daylight and colour vision — become significantly involved. This sequencing is what places most classic cases of retinitis pigmentosa under the rod-cone dystrophy label, and it is clinically important because it predicts the order in which symptoms will appear.
For Somali patients referred with this specific terminology on a prior report, understanding the rod-first pattern helps set realistic expectations about which visual functions are likely to be affected earliest and which are likely to be preserved for longer.
10+
years Experience
years Experience
5000+
Patients treated
Patients treated
100+
Countries served
Countries served
NABH
Guided facility
Guided facility
Symptoms of Rod & Cone Dystrophy
Because rods fail first, night vision difficulty and peripheral field constriction tend to dominate the early and middle stages of the disease. Central visual acuity and colour discrimination are usually relatively preserved during this period, only declining once the degeneration progresses to involve the cone-dense central retina in later stages. Patients often describe this as a gradual ‘closing in’ of their field of view rather than a sudden change in clarity.
Causes of Rod & Cone Dystrophy
The rod-first degeneration pattern arises from mutations in genes that are more heavily expressed in, or more critical to, rod photoreceptor survival — overlapping substantially with the broader genetic landscape of retinitis pigmentosa. Inheritance can be autosomal dominant, autosomal recessive, or X-linked depending on the specific gene, and can occur as an isolated retinal finding or as part of a broader syndrome affecting other organ systems.
Diagnosis for Somali Patients
Electroretinography is central to distinguishing rod-cone dystrophy from its mirror-image counterpart, cone-rod dystrophy: in rod-cone dystrophy, the rod-driven ERG response is disproportionately reduced relative to the cone-driven response, especially in earlier stages. This is supplemented with visual field testing to map the extent of peripheral involvement and OCT imaging to assess the structural integrity of the remaining photoreceptor layers.
Meet The Team
Our Eye Specialists
Dr. Pawan
Associate Professor, Vitreo-Retina Surgeon. 10+ Years Experience
Retinal disorders, diabetic retinopathy, and advanced retina procedures. Provides diagnostic evaluation and treatment planning for international patients.
Dr.Pallavee
Senior Consultant Ophthalmologist & Eye Surgeon· 26+ yrs experience
Areas of Focus: Cataract surgery, corneal disorders, refractive procedures, and glaucoma management. Provides comprehensive eye care and surgical expertise for global patients.
Dr. Robin
Consultant Ophthalmologist & Eye Surgeon, MD, DO .16+ Years Experience
Areas of Focus: Cataract surgery, corneal disorders, refractive procedures, and glaucoma management. Provides comprehensive eye care and surgical expertise for global patients.
Treatment Approach in India
Care planning follows the same regenerative and supportive framework used for other progressive photoreceptor dystrophies — stem cell therapy is evaluated as a means of supporting remaining retinal function where testing indicates the patient is a reasonable candidate, alongside practical guidance on adapting to reduced night and peripheral vision while central vision remains comparatively stable.
Reviews
What Our Patients Say
DR NAAGALAKSHMI R
1 week ago
Asha Babbar
2 weeks ago
The overall experience at the RP Treatment Center was very good. The staff was supportive and caring, and we provided proper attention and guidance during treatment. The environment at the center was clean and comfortable. The doctors and staff tried to understand patients' needs and explained the treatment process well.
Overall, I am satisfied with the service and care. Highly recommended!
Overall, I am satisfied with the service and care. Highly recommended!
Harshita Kapoor
2 weeks ago
Life‑Changing Experience with RP Therapy”
After years of struggling with vision loss due to Retinitis Pigmentosa, I finally found hope here. The doctors were highly professional, explained the stem cell treatment in detail, and gave me confidence at every step. The therapy was smooth, and I’ve already noticed positive changes in my daily life. Their dedication, care, and advanced medical approach make this center truly trustworthy
After years of struggling with vision loss due to Retinitis Pigmentosa, I finally found hope here. The doctors were highly professional, explained the stem cell treatment in detail, and gave me confidence at every step. The therapy was smooth, and I’ve already noticed positive changes in my daily life. Their dedication, care, and advanced medical approach make this center truly trustworthy
Yash Chauhan
2 weeks ago
I had a really good experience at RP Treatment Centre. The doctor listened to my problem patiently and explained the treatment in a simple way. The staff was polite and the clinic was clean. I started feeling better after the treatment. Highly recommended!
pragya chauhan
2 weeks ago
Very satisfied with the service. The doctor is experienced and gives proper attention to every patient. The staff is friendly, and the overall environment is comfortable. Thank you, RP Treatment Centre, for the excellent care.
Manisha kapoor
2 weeks ago
I had been struggling with Retinitis Pigmentosa for years, and finding this center was truly life‑changing. The doctors provided a thorough medical evaluation and explained every step of the stem cell therapy process with clarity. The treatment was smooth, professional, and I noticed encouraging improvements in my vision within weeks. Their continuous follow‑up care and compassionate support made me feel confident throughout the journey. Highly recommended for anyone seeking advanced RP treatment in India.
Frequently Asked Questions
Is rod-cone dystrophy the same thing as retinitis pigmentosa?
“The terms overlap substantially. ‘Rod-cone dystrophy’ describes the pattern in which the disease progresses — rods affected before cones — and this pattern applies to the large majority of what is clinically called retinitis pigmentosa.”
What is the difference between rod-cone and cone-rod dystrophy?
”
The order of photoreceptor involvement is reversed. In rod-cone dystrophy, night vision and peripheral vision decline first while central and colour vision are preserved longer; in cone-rod dystrophy, central vision and colour perception are typically affected earlier, with peripheral and night vision more preserved initially.”
Will my central vision eventually be affected too?
“In many rod-cone dystrophies, central vision can decline in later stages once the disease progresses to involve the cone photoreceptors, though the timeline varies widely between individuals and depends heavily on the underlying genetic cause.”
How often should progression be monitored?
“This is decided case by case after the initial evaluation, based on the rate of change seen in your ERG and visual field results. Some patients are monitored annually, while others with a more stable pattern may be reviewed less frequently.”
