MYOC rs10488631: Understanding Juvenile Glaucoma Risk
The rs10488631 variant is a specific genetic change located within the MYOC gene. It is recognized in scientific literature as a potential risk factor associated with the development of juvenile-onset open-angle glaucoma.
What each genotype means
Typical MYOC promoter profile
This genotype represents the common sequence at this promoter site. It is not associated with the pathogenic coding mutations in the MYOC gene that are known to cause juvenile-onset open-angle glaucoma.
This is the most common genotype found in the general population.
Heterozygous promoter variant
You carry one copy of the variant allele at this promoter site. Research into this specific polymorphism has investigated its potential influence on glaucoma phenotypes, though it is distinct from the rare, high-impact coding mutations in MYOC that cause juvenile-onset glaucoma.
This genotype is found at lower frequencies in the general population compared to the homozygous common genotype.
Homozygous promoter variant
You carry two copies of the variant allele at this promoter site. Studies have examined this genotype in the context of adult-onset open-angle glaucoma, but it does not carry the same high-risk profile as the rare, pathogenic coding mutations in the MYOC gene.
This genotype is rare in the general population.
What is rs10488631?
The rs10488631 variant is a single nucleotide polymorphism (SNP) located within the MYOC gene, which sits on chromosome 1. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. While most SNPs have no effect on health, some are located in regions that influence how genes function or how proteins are produced. The rs10488631 variant is specifically cataloged due to its association with ocular health, particularly in the context of juvenile-onset open-angle glaucoma. It is important to understand that identifying a variant like rs10488631 does not mean an individual will develop a condition; rather, it indicates a statistical association observed in research studies. Genetic variants are common, and their presence is simply one piece of a much larger biological puzzle that includes environmental factors and other genetic influences.
The Role of the MYOC Gene
The MYOC gene provides instructions for making a protein called myocilin. This protein is found in various tissues of the eye, particularly in the trabecular meshwork, which is the drainage system that regulates the flow of fluid out of the eye. Proper fluid drainage is essential for maintaining healthy intraocular pressure. When the MYOC gene functions correctly, myocilin helps maintain the structural integrity of the eye's drainage pathways. Research suggests that certain variants in this gene may lead to the production of abnormal myocilin proteins that can accumulate within the cells of the trabecular meshwork. This accumulation is thought to interfere with normal fluid outflow, potentially leading to increased pressure within the eye, which is a primary risk factor for glaucoma. Understanding this gene is a major focus of ophthalmological research aimed at uncovering the molecular mechanisms of vision loss.
Research and Evidence Strength
The association between MYOC variants and glaucoma has been studied extensively since the gene was first linked to the condition. While the MYOC gene is well-established as a cause of certain forms of inherited glaucoma, the evidence for specific variants like rs10488631 is often categorized as moderate. Scientific studies, including genome-wide association studies (GWAS), look for correlations between specific genetic markers and disease traits. For rs10488631, the evidence suggests it acts as a risk factor, but the penetrance—the likelihood that a person with the variant will actually develop the disease—can vary significantly. Some individuals with high-risk variants may never develop glaucoma, while others might. Because glaucoma is a complex, multifactorial disease, researchers emphasize that genetic testing for a single variant like rs10488631 is rarely sufficient to predict clinical outcomes on its own.
Population Frequency
The rs10488631 variant is considered rare in the general population, typically appearing at a frequency of less than 1%. Because it is rare, it is not found in the vast majority of people. Research into the prevalence of MYOC risk variants has shown that they can be distributed differently across various ancestral groups, with some studies noting higher prevalence in specific Asian populations. However, because the variant is uncommon, large-scale studies are required to accurately determine its frequency and its specific impact across diverse global populations. The rarity of the variant also means that clinical data is often limited to specific families or cohorts, which can make it challenging to generalize findings to the entire human population. As more genomic data becomes available through global databases, our understanding of how this variant is distributed will continue to evolve.
Navigating Genetic Information
If you have received information about your status regarding rs10488631, it is important to approach this data with perspective. Genetic information is not a medical diagnosis. The presence of a risk variant does not guarantee that you will develop glaucoma, nor does its absence guarantee that you will not. If you are concerned about your eye health or family history, the most effective step is to consult with an ophthalmologist or a genetic counselor. These professionals can provide context based on your personal health history, perform necessary clinical screenings, and help you understand what your genetic results mean for your specific situation. Avoid making health decisions based solely on online reports. Always discuss any concerns about your vision or genetic risk with a qualified healthcare provider who can offer personalized guidance and appropriate clinical monitoring.
How common is this variant?
The rs10488631 variant is rare in the general population, occurring at a frequency of less than 1%.
Frequently asked questions
Does having the rs10488631 variant mean I have glaucoma?
No, having this variant does not mean you have glaucoma. It is a genetic marker associated with an increased risk, but it is not a diagnostic test for the disease itself.
Should I get tested for MYOC variants?
Genetic testing for MYOC variants is typically reserved for individuals with a strong family history of early-onset glaucoma. You should discuss the necessity of such testing with an ophthalmologist or a genetic counselor.
Can I prevent glaucoma if I have this variant?
While you cannot change your genetics, regular eye exams are the best way to monitor your eye health. Early detection through professional screening is the most effective way to manage glaucoma risk.
Is rs10488631 the only cause of glaucoma?
No, glaucoma is a complex disease with many causes, including other genetic variants, age, and environmental factors. Most cases of glaucoma are not caused by a single genetic variant.
Sources & further reading
Educational information only, last refreshed 10/9/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs10488631?
Upload a raw DNA file from 23andMe, AncestryDNA, MyHeritage, or FamilyTreeDNA and see this variant — plus thousands more — interpreted in your full report.
Get my report — $29Related variants in MYOC
Encodes the classical Gln368STOP mutation in myocilin, a well-validated genetic cause of juvenile- and adult-onset primary open-angle glaucoma.
A major missense variant in the myocilin olfactomedin domain causative of juvenile- and adult-onset primary open-angle glaucoma.
Missense mutation in MYOC (p.Gln368Glu) predisposing carriers to elevated intraocular pressure and adult-onset primary open-angle glaucoma.
A pathogenic point mutation in MYOC strongly linked to autosomal dominant primary open-angle glaucoma with high intraocular pressure.
A pathogenic missense variant in myocilin causing trabecular meshwork disruption and juvenile-onset open-angle glaucoma.
Known as the Gln368STOP mutation in MYOC, this nonsense variant is a well-established cause of autosomal dominant juvenile- and adult-onset primary open-angle glaucoma.