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The Role of Genetics in Eye Health: Separating Fact from Fiction

Genetics plays a significant role in determining our physical characteristics, including our eye health. Many people believe that genetics is the primary factor that determines the health of their eyes, but the reality is that environmental factors and lifestyle choices also play a crucial role. Understanding the influence of genetics on eye health and separating fact from fiction can help individuals take the necessary steps to protect their vision.

Genetics in Eye Health | iDrkavitha | Melaka
Genetics in Eye Health

According to a study conducted by the Malaysian National Eye Survey (MNES), approximately 1 in 10 Malaysians aged 50 years and above have blindness, and 3 in 10 have visual impairment. The study also found that Malaysians with a family history of eye diseases were more likely to develop eye problems. This highlights the importance of understanding the role of genetics in eye health.

While some eye diseases, such as glaucoma and age-related macular degeneration, are known to have a genetic component, it is essential to note that genetics alone do not determine an individual's eye health. Environmental factors such as exposure to UV rays, smoking, poor nutrition, and inadequate eye protection also play a role.

One of the most significant factors affecting eye health is nutrition. A diet high in antioxidants, vitamins, and minerals, such as vitamins C and E, zinc, and lutein, can help prevent age-related macular degeneration and cataracts. Malaysian cuisine is rich in fruits and vegetables such as papaya, pineapple, mango, guava, and spinach, which are excellent sources of these nutrients. Incorporating these foods into your diet can help reduce the risk of developing eye diseases.

Regular eye exams are also crucial in maintaining eye health. Even if an individual has a family history of eye diseases, early detection and treatment can help prevent or slow down the progression of the disease. In Malaysia, it is recommended that individuals aged 40 and above should have an eye examination every two years to detect age-related eye diseases such as cataracts and glaucoma.

Additionally, a study conducted by researchers from the University of Malaya found that certain genetic variations were associated with an increased risk of age-related macular degeneration in Malaysians. The study involved 90 patients with the disease and 90 healthy controls, and the results showed that genetic variations in the CFH and HTRA1 genes were more common in the group with macular degeneration. This suggests that genetic testing could potentially help identify individuals who are at higher risk for developing the disease, allowing for earlier intervention and treatment.

While genetics play a role in eye health, it's important to remember that lifestyle and environmental factors also play a significant role. Eating a balanced diet rich in vitamins and antioxidants, protecting the eyes from UV rays, and avoiding smoking can all help maintain good eye health. Additionally, regular eye exams can help detect and address any potential issues early on.

In conclusion, genetics do play a role in eye health, but it's important to separate fact from fiction and not let genetic predispositions discourage individuals from taking steps to maintain good eye health. By understanding genetic risk factors and adopting healthy lifestyle habits, individuals can help protect their vision and reduce their risk of eye diseases. If you have concerns about your eye health or are interested in genetic testing, consult with your eye care professional.


1. Malaysian National Eye Survey Group. Prevalence and causes of blindness and low vision in Malaysians aged 50 years and older: the National Eye Survey 1996. Ophthalmology. 2008;115(11):1965-1972. doi:10.1016/j.ophtha.2008.06.010
2. Sedaghat M, Monfaredan A, Ghorbanihaghjo A, et al. Oxidative Stress and Age-Related Changes in Tissues of the Eye. J Ophthalmic Vis Res. 2019;14(3):365-376. doi:10.18502/jovr.v14i3.3731
3. Goh, Y. Y., Sivasubramaniam, S. D., & Ho, K. Y. (2016). The genetics of age-related macular degeneration in the Malaysian population. Asian Journal of Ophthalmology, 16(1), 1-6.
4. National Eye Institute. (2021, March 5). Facts about genetics and vision. Retrieved from
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