by Allan Peterson
My blindness is the result of retinitis pigmentosa (RP), a genetic disease that primarily affects the retina. I was first diagnosed by an ophthalmologist in Fargo, N.D. in the fall of 1976. At the time, the diagnosis came as a complete surprise to my family and me, as there was no known family history of RP.
RP is now known to include more than 350 genetic variants, and over the years I became determined to understand which specific gene was responsible for my condition. That search finally paid off this past fall, when genetic testing identified the exact cause of my RP: an autosomal recessive mutation.
In simple terms, our genetic makeup is formed from DNA inherited from both parents. A recessive gene is only expressed when both copies of the gene are defective. In my case, I inherited one defective RP gene from each parent. Although my parents carried the gene, they did not develop RP themselves because each also had a healthy copy of the gene that masked the defective one.
As children, my brothers and I each had a one-in-four chance of inheriting two defective copies. I was the one who did. My brothers received at least one healthy copy and therefore did not develop RP. The same is true for our three children, who inherited a healthy copy from their mother.
RP primarily affects the rod and cone photoreceptors in the retina. These cells capture light and transmit signals through the visual pathway to the brain, where vision is formed. Rods are responsible for night and peripheral vision, while cones allow us to see color and fine detail, particularly in the central retina (the macula).
The earliest symptom of RP is often night blindness, as rods are usually affected first. Loss of peripheral vision commonly follows, along with difficulties distinguishing colors — in my case, especially between shades of blue and green. Looking back, I now recognize that I experienced mild symptoms several years before my formal diagnosis.
After the diagnosis, my vision loss accelerated. I became legally blind around 1981, and by the late 1980s I no longer had usable vision.
My genetic testing also revealed something remarkable: the two mutations responsible for my RP trace back to different ancestral populations — one from a Finnish subpopulation and the other from a Spanish European subpopulation. While RP remains a progressive condition, and current treatments are largely experimental, science continues to move forward at a pace that gives genuine reason for hope.
Would I choose not to be blind if given the option? Without hesitation, yes. But I also accept who I am — a person who is blind. Blindness is not something I sought, but it is something I have learned to live with, adapt to, and understand deeply. I am always willing to speak with others about this journey, because knowledge — shared openly — matters.
Looking Forward: Hope Through Research
Although there is currently no cure for retinitis pigmentosa, the future is brighter than it has ever been. Advances in genetic science have transformed RP from a single diagnosis into a collection of well-defined conditions, opening the door to treatments that are more precise, more personal, and more effective than ever before.
Researchers are actively exploring gene-based therapies designed to correct or compensate for defective genes, with the goal of slowing — and in some cases stopping — retinal degeneration. Other approaches focus on protecting remaining retinal cells, preserving vision for as long as possible. Still others are pushing the boundaries of what was once unimaginable, including optogenetics, retinal implants, and regenerative strategies that may one day restore meaningful visual function even after significant loss.
Hope does not always arrive as a dramatic cure. Sometimes it comes quietly — in extended independence, improved contrast, better light perception, or simply more time. Every step forward matters.
I may not personally benefit from many of these advances, but I believe deeply in the importance of continuing the work. Research today is not just about curing disease; it is about changing what the future looks like for those who come next. With continued collaboration, education, and commitment, inherited blindness does not have to remain an accepted destiny.
Hope, like vision, can take many forms — and it is very much alive.