PAX6 rs3811800: Understanding Genetic Links to Myopia
The rs3811800 variant is an intronic polymorphism located within the PAX6 gene, a critical regulator of ocular development. Research has investigated this variant for potential associations with variations in ocular axial length and the development of myopia.
What each genotype means
Typical PAX6 regulatory profile
This genotype represents the common form of this regulatory region in the PAX6 gene. While some research has investigated the role of PAX6 variants in eye development and myopia, the evidence linking this specific intronic polymorphism to clinical outcomes remains limited and inconsistent across different populations. It is important to remember that myopia is a complex condition influenced by many genetic and environmental factors.
This is the most common genotype in many global populations, though frequency varies significantly by ancestry.
Variant PAX6 regulatory profile
You carry one copy of the minor allele at this PAX6 location. Some studies have explored whether this variant influences axial length or myopia susceptibility, but findings are mixed and often limited to specific ancestral groups. Because the evidence is not definitive, this result should not be used to predict your personal risk for vision changes; please consult an eye care professional for routine screenings.
This genotype is observed in approximately 30% of individuals of East Asian ancestry, with lower frequencies reported in other populations.
Variant PAX6 regulatory profile
You carry two copies of the minor allele at this PAX6 location. Research into this variant's association with eye development and myopia has produced inconsistent results, and the clinical significance of this genotype is currently considered limited. Myopia development is multifactorial, and this genetic marker alone does not determine your vision health.
This genotype is less common than the CT or CC configurations, occurring at lower frequencies in most studied populations.
What is rs3811800?
The variant rs3811800 is a single nucleotide polymorphism (SNP) situated within the PAX6 gene on chromosome 11. In genetics, an intronic variant like this one resides in a non-coding region of the gene, meaning it does not directly alter the sequence of the protein produced by the gene. Instead, such variants are often studied for their potential role in gene regulation—how, when, and where a gene is turned on or off. Because PAX6 is a master regulator of eye development, researchers are interested in whether variations in its regulatory regions might influence the physical structure of the eye, such as its axial length, which is the distance from the front to the back of the eyeball. Understanding these non-coding variants is a major focus of modern genomics, as they may help explain the complex, polygenic nature of traits like refractive error.
The Role of the PAX6 Gene
PAX6 is widely recognized as a master control gene for eye development across many species. It encodes a transcription factor, a protein that binds to specific DNA sequences to control the expression of other genes. During embryonic development, PAX6 is essential for the formation of the eye, including the retina, iris, and lens. Because of its fundamental role, mutations that severely disrupt the PAX6 protein can lead to significant congenital eye conditions, such as aniridia, where the iris is partially or completely absent. However, the variant rs3811800 is not a disease-causing mutation of this type. Instead, it is a common polymorphism being investigated for its subtle influence on normal ocular growth. By studying how PAX6 expression is modulated, scientists hope to better understand the biological pathways that lead to variations in eye size and the development of common refractive conditions like myopia.
Research and Evidence Strength
The association between rs3811800 and myopia is considered to have limited evidence. While the PAX6 gene is a strong biological candidate for eye-related traits, genome-wide association studies (GWAS) often find that individual SNPs have very small effects on complex traits. Some studies have explored the relationship between PAX6 polymorphisms and high myopia, particularly in East Asian populations, but results can be mixed or difficult to replicate across different ethnic groups. It is important to note that myopia is a complex condition influenced by a combination of genetic, environmental, and behavioral factors, such as time spent on near-work activities or outdoor exposure. Consequently, a single SNP like rs3811800 is unlikely to be a sole determinant of whether an individual develops myopia. Current research continues to refine our understanding of how these genetic markers interact with environmental triggers to influence eye health.
What This Information Means for You
If you have information about your genotype for rs3811800, it is important to view it in the context of general scientific research rather than as a medical diagnostic tool. Because the evidence linking this specific variant to myopia is limited and the trait itself is highly complex, this SNP cannot be used to predict your personal risk of developing nearsightedness. Genetic markers are only one piece of a much larger puzzle that includes your lifestyle, environment, and family history. You cannot change your genotype, but you can manage your eye health through regular comprehensive eye exams with an optometrist or ophthalmologist. If you have concerns about your vision, such as difficulty seeing distant objects, consult a qualified eye care professional. They can provide appropriate clinical assessments and discuss evidence-based strategies for managing refractive errors, regardless of your genetic profile.
How common is this variant?
The minor allele frequency for rs3811800 is approximately 0.30 in East Asian populations, indicating that the variant is relatively common in this group.
Frequently asked questions
Does having this variant mean I will be nearsighted?
No. Myopia is a complex trait influenced by many genes and environmental factors. A single variant like rs3811800 does not determine whether you will develop nearsightedness.
Is rs3811800 a mutation that causes eye disease?
No, rs3811800 is a common polymorphism, not a disease-causing mutation. Severe eye conditions related to PAX6 are typically caused by rare, disruptive mutations, not common variants like this one.
Can I use this information to prevent myopia?
No. There is no evidence that knowing your genotype for this variant can be used to prevent myopia. Eye health is best managed through regular professional eye exams.
Why is this variant more common in some populations?
Genetic variants often vary in frequency across different ancestral groups due to historical population patterns and evolutionary factors. This is a normal observation in human genomics.
Sources & further reading
Educational information only, last refreshed 9/16/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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Pathogenic loss-of-function nonsense variant in PAX6 resulting in congenital absence of the iris (aniridia) and associated anterior segment dysgenesis.
A high-penetrance single nucleotide substitution disrupting PAX6 function and leading to aniridia and congenital anterior segment dysgenesis.
Nonsense change in PAX6 leading to haploinsufficiency and classical congenital aniridia.
A classic nonsense mutation (p.Arg240Ter) in the PAX6 master regulator of eye development leading to haploinsufficiency and congenital aniridia.
Classical stop-gain variant in PAX6 leading to haploinsufficiency and congenital aniridia with associated foveal hypoplasia and decreased visual acuity.
Pathogenic missense variant in PAX6 causing developmental ocular malformations including aniridia and congenital ocular coloboma.