Myopia and Genetics: Progress Toward Personalized Treatment

Genetic research is transforming our understanding of myopia and opening doors to personalized prevention and treatment.

Genetic Discoveries

What We've Found

• Over 500 genetic loci associated with myopia
• Both common and rare variants identified
• Genes affecting eye growth, structure, and signaling

Key Genes Involved

• **PAX6**: Eye development
• **GJD2**: Gap junction protein
• **RASGRF1**: Signaling pathway
• **LAMA2**: Extracellular matrix

Heritability

Research shows:

• 60-80% of myopia risk is genetic
• Environment modifies genetic risk
• Gene-environment interactions important

Polygenic Risk Scores

Scientists developing scores that:

• Combine multiple genetic variants
• Predict myopia risk before onset
• May guide early intervention
• Still being validated

Implications for Treatment

Personalized Approaches

Future possibilities include:

• Identifying high-risk children earlier
• Tailoring treatment intensity to risk
• Predicting treatment response
• Developing targeted therapies

Current Applications

While not yet routine:

• Family history remains best predictor
• Genetic testing being researched
• May become clinical tool in future

Gene-Environment Interaction

Important findings:

• Genetic risk modified by environment
• Outdoor time protective even with high genetic risk
• Education/near work amplifies genetic risk

Future Directions

Research ongoing in:

• Larger genetic studies
• Functional understanding of genes
• Pharmacogenomics (predicting drug response)
• Gene therapy possibilities (distant future)

What This Means Now

For parents today:

• Family history is important information
• Environmental factors still modifiable
• Early intervention remains key
• Genetic testing not yet recommended routinely