LINC00340 rs72653771: What Your Genotype Means
The rs72653771 variant is a single-nucleotide polymorphism located within the LINC00340 gene region. It has been identified in large-scale genome-wide association studies as a genetic marker associated with refractive error and the regulation of axial eye length.
What each genotype means
Typical refractive risk
This genotype represents the most common form of this variant in many populations. Research indicates that this variant is associated with refractive error and axial length regulation, but this specific genotype does not carry the minor allele linked to these traits in large-scale meta-analyses. As refractive error is a complex, polygenic trait, your overall risk is determined by the cumulative effect of many genetic factors and environmental influences.
Carried by approximately 67% of individuals of European ancestry, based on a minor allele frequency of 0.18.
Slightly altered refractive risk
Carrying one copy of the minor allele is associated with variations in axial length regulation and refractive error development in large-scale genetic studies. Because myopia and refractive errors are multifactorial, this genotype is only one of many factors that contribute to your visual health. Please consult with an eye care professional for routine vision screenings and to discuss any concerns regarding your refractive status.
Carried by approximately 30% of individuals of European ancestry.
Increased refractive risk
This genotype includes two copies of the minor allele, which has been identified in meta-analyses as being associated with refractive error and changes in axial length. While this association is statistically significant, it is part of a complex polygenic architecture where many genes and environmental factors influence eye development. This result is not a diagnosis; please discuss your vision history and any refractive concerns with your optometrist or ophthalmologist.
Carried by approximately 3% of individuals of European ancestry.
Understanding the SNP and Its Location
The variant rs72653771 is a single-nucleotide polymorphism (SNP), which is a variation at a single position in the DNA sequence. This specific SNP is situated within the genomic region of LINC00340. In genetics, LINC stands for 'long intergenic non-coding' RNA. These regions do not provide instructions for making proteins in the traditional sense, but they often play complex roles in regulating how other genes are expressed or how cells function. Researchers identify these variants by comparing the DNA of large groups of people with specific traits—such as nearsightedness—against those without them. When a specific letter change appears more frequently in one group, it is flagged as a potential genetic association. Because this variant sits in a non-coding region, its exact biological mechanism is still a subject of ongoing scientific investigation rather than a direct 'instruction' for eye structure.
The Role of LINC00340 in Eye Health
LINC00340 is one of several genetic loci identified by the Consortium for Refractive Error and Myopia (CREAM) as being linked to refractive error. Refractive error occurs when the shape of the eye prevents light from focusing directly on the retina, leading to blurred vision. While the specific function of the LINC00340 transcript is still being characterized, its association with refractive error suggests it may be involved in the developmental pathways that determine the axial length of the eye. The axial length—the distance from the front to the back of the eye—is a primary determinant of whether a person is nearsighted (myopic) or farsighted. Research into these loci helps scientists map the complex, polygenic architecture of vision, moving beyond simple 'myopia genes' to understand the intricate biological network that governs how our eyes grow and adapt throughout childhood and into adulthood.
Research Evidence and Statistical Associations
The evidence linking rs72653771 to refractive error is categorized as moderate, primarily derived from large-scale meta-analyses of European ancestry cohorts. These studies, such as those published in Nature Communications, utilize genome-wide association study (GWAS) methodologies to identify statistical correlations. It is important to note that these findings represent population-level associations rather than individual diagnostic markers. Myopia is a complex, multifactorial condition influenced by both genetic predisposition and environmental factors, such as education level and time spent on near-work activities. While rs72653771 contributes to the statistical model of refractive error, it is only one of hundreds of variants that collectively influence vision. The strength of these associations can vary between different ethnic populations, and current research continues to refine how these genetic 'risk scores' can be used to predict the onset or progression of refractive conditions.
Interpreting Your Genetic Information
If you have access to your genetic data, you may see your genotype for rs72653771. It is vital to understand that this information is for educational purposes and does not constitute a medical diagnosis. Because refractive error is influenced by a wide array of genetic and environmental factors, knowing your status for a single SNP like rs72653771 cannot predict your personal risk of developing myopia or the severity of your vision. You cannot 'change' your genotype, nor should you use this information to make medical decisions. If you are concerned about your vision, the most effective step is to consult an optometrist or ophthalmologist for a comprehensive eye exam. They can provide clinical assessments based on your actual visual acuity and eye health, which are far more informative than any single genetic variant. Always prioritize professional clinical advice over genetic data when managing your health.
How common is this variant?
The minor allele frequency for rs72653771 is approximately 0.18 in European populations, meaning the variant is relatively common but not the majority allele.
Frequently asked questions
Does having the minor allele mean I will definitely be nearsighted?
No. Refractive error is a complex trait influenced by many genes and environmental factors. A single SNP like rs72653771 only provides a tiny fraction of the total genetic picture and cannot predict your vision outcome.
Can I use this SNP to prevent myopia?
There is no evidence that knowing your genotype for this variant can be used to prevent myopia. Myopia management is best handled by eye care professionals who can monitor your vision and recommend evidence-based interventions.
Why is this variant linked to 'moderate' evidence?
In genomics, 'moderate' evidence usually means that while the statistical association is significant in large studies, the biological mechanism is not yet fully understood. Researchers are still working to confirm exactly how this variant influences eye development.
Is this variant the same as the ones found in Asian populations?
Some genetic loci for myopia are shared across ancestries, while others are population-specific. Research indicates that genetic risk profiles can differ significantly between European and Asian cohorts, so findings in one group may not always apply to another.
Sources & further reading
Educational information only, last refreshed 9/18/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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