RDH5 rs17183295: What Your Genotype Means
The rs17183295 variant is a genetic marker located within the RDH5 gene, which plays a critical role in the visual cycle. Research has associated this specific locus with quantitative measures of refractive error and visual acuity across various populations.
What each genotype means
Typical baseline vision trait profile
You carry two copies of the common G allele at this intronic RDH5 marker. Large population association studies link this baseline genotype with typical statistical distributions of refractive error and visual acuity. Current evidence for this specific variant is limited and population-wide, meaning it does not indicate any monogenic eye disorder or diagnose vision changes on its own.
Carried by approximately 60% to 70% of individuals in European populations, where the G allele represents the major allele.
Slightly shifted refractive trait association
You carry one copy of the A minor allele at this RDH5 intronic locus. Multi-ethnic genome-wide association studies show modest, statistical correlations between this allele and small variations in refractive error measurements and visual acuity. Because the clinical evidence strength is limited, having this genotype represents a minor population-level variation rather than a deterministic cause of vision impairment.
Found in roughly 25% to 35% of people in European cohorts and observed across diverse ancestral groups at varying minor allele frequencies.
Modest refractive trait association
You carry two copies of the A allele at this RDH5 locus. In large vision research cohorts, carrying two copies of this variant has been weakly correlated with minor statistical differences in quantitative refractive error parameters. However, the overall evidence remains limited and polygenic, and this result does not diagnose myopia, hyperopia, or any inherited retinal condition.
Carried by approximately 2% to 6% of individuals of European ancestry.
Understanding the rs17183295 Variant
The rs17183295 variant is a single nucleotide polymorphism (SNP) situated within the RDH5 gene. In genetics, an intronic variant like this one resides in a non-coding region of the gene, meaning it does not directly alter the protein sequence produced by the gene. Instead, such variants are often studied for their potential role in regulating gene expression or as markers that are inherited alongside other functional genetic changes. Because this variant is located in a region associated with vision-related traits, researchers monitor it to understand how subtle genetic differences contribute to the wide spectrum of human refractive errors, such as myopia or hyperopia, which affect how light focuses on the retina.
The Role of the RDH5 Gene
The RDH5 gene provides instructions for making an enzyme called 11-cis-retinol dehydrogenase. This enzyme is essential for the visual cycle, a complex biochemical process that occurs in the retina. Specifically, it helps convert retinol into 11-cis-retinal, which is a vital component of the light-sensitive pigments found in rod and cone cells. These pigments are necessary for the eye to detect light and transmit visual signals to the brain. While rare, severe mutations in the RDH5 gene are known to cause conditions like fundus albipunctatus, a form of stationary night blindness. However, common variants like rs17183295 are generally studied in the context of normal variation in visual health rather than rare, disease-causing mutations.
Evidence and Research Associations
Current evidence linking rs17183295 to visual traits is considered limited. Large-scale genome-wide association studies (GWAS) have identified this locus as being statistically associated with quantitative measures of refractive error and visual acuity. These studies analyze the genomes of thousands of individuals to find correlations between specific genetic markers and physical traits. While these associations provide valuable insights into the genetic architecture of vision, they do not imply a direct cause-and-effect relationship. The influence of any single SNP on complex traits like refractive error is typically very small, and these traits are influenced by a combination of many genetic factors, environmental exposures, and lifestyle habits. Consequently, this variant is viewed as one of many pieces in a much larger, complex puzzle.
Interpreting Your Genetic Information
It is important to understand that genetic associations are statistical observations made at the population level and cannot predict individual health outcomes. If you have received information about your genotype for rs17183295, it should not be used to diagnose any condition or guide medical decisions. Vision is a complex trait influenced by numerous factors, including your environment and daily habits. If you have concerns about your vision, such as changes in acuity or difficulty focusing, the most appropriate step is to consult an eye care professional, such as an optometrist or ophthalmologist. They can provide a comprehensive examination and personalized advice based on your clinical history, which is far more informative than any single genetic marker.
How common is this variant?
The rs17183295 variant has a minor allele frequency (MAF) of approximately 0.15 to 0.25 in European cohorts, indicating that it is a relatively common genetic variation.
Frequently asked questions
Does having the rs17183295 variant mean I will have vision problems?
No. This variant is a statistical marker associated with refractive error in large studies, but it does not determine your individual vision health. Many factors, including genetics and environment, contribute to how well you see.
Can I use this genetic information to prevent myopia?
There is no evidence that knowing your status for this specific variant can be used to prevent refractive errors. You should focus on regular eye exams and healthy visual habits as recommended by your eye care professional.
Is rs17183295 related to eye diseases like macular degeneration?
Current research links this variant to refractive error and visual acuity, not specifically to degenerative eye diseases. Always consult a medical professional for concerns regarding specific eye conditions.
Why is the evidence for this variant called 'limited'?
Evidence is labeled as limited when the statistical association is observed in studies but the biological mechanism or the clinical impact remains unclear. It suggests that more research is needed to fully understand the role of this variant.
Sources & further reading
Educational information only, last refreshed 10/18/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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