OCT Results: Impact of High Myopia on Macular Nerve Fiber Thickness - Ophthalmology

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Questions about the optic nerve and OCT (Optical Coherence Tomography)?


Hello Dr.
Gao, I have high myopia (around -7.50 to -8.00) and regularly visit the hospital for check-ups.
I would like to ask you about the OCT results, specifically regarding the ganglion cell layer thickness in the macular region, which shows several yellow patches.
Could this be related to my high myopia, or is it abnormal? Thank you for your clarification.

v, 30~39 year old female. Ask Date: 2023/06/11

Dr. Gao Pilin reply Ophthalmology


Hello: Generally speaking, high myopia may affect the retina and increase the risk of developing certain eye diseases, such as macular issues.
However, to determine whether this condition is related to your high myopia or if it is considered abnormal, it is best to consult your attending physician.
I apologize, but I cannot provide a diagnosis without proper evaluation.

Reply Date: 2023/06/11

More Info


High myopia, defined as a refractive error greater than -6.00 diopters, can significantly impact the structure and function of the eye, particularly the retina and the optic nerve. The Optical Coherence Tomography (OCT) test is a non-invasive imaging technique that provides detailed cross-sectional images of the retina, allowing for the assessment of various retinal layers, including the nerve fiber layer in the macula.

In your case, the presence of yellow areas in the macular nerve fiber thickness sector on the OCT report may indicate a reduction in the thickness of the retinal nerve fiber layer (RNFL). This thinning can be associated with high myopia due to several factors. High myopia often leads to elongation of the eyeball, which can stretch the retina and result in structural changes. These changes can include thinning of the RNFL and other retinal layers, potentially increasing the risk of developing conditions such as myopic macular degeneration or even glaucoma.

The yellow markings on your OCT report suggest that the nerve fiber thickness is approaching the lower limits of normal, which could be a consequence of your high myopia. However, it is essential to interpret these findings in the context of your overall eye health and any symptoms you may be experiencing. While some degree of RNFL thinning can be a normal finding in individuals with high myopia, it is crucial to monitor these changes over time to ensure they do not progress to a more serious condition.

Regarding whether these findings are abnormal or simply a result of high myopia, it is best to consult with your ophthalmologist. They can provide a comprehensive evaluation, taking into account your visual acuity, any symptoms you may have, and the results of other tests, such as visual field testing. If your ophthalmologist determines that the changes in your RNFL are consistent with high myopia and not indicative of a pathological condition, they may recommend regular monitoring rather than immediate intervention.

In addition to RNFL thinning, high myopia can also lead to other visual symptoms, such as distortion or blurriness in vision, particularly at distance. This is often due to the elongation of the eye and the resulting changes in the shape of the retina. If you are experiencing visual distortions or other symptoms, it is important to discuss these with your doctor, as they may warrant further investigation.

In conclusion, while the OCT findings you described may be related to your high myopia, it is essential to have a thorough discussion with your ophthalmologist to understand the implications of these results fully. Regular follow-up appointments and monitoring of your eye health are crucial in managing high myopia and preventing potential complications. Your eye care provider will be able to guide you on the best course of action based on your specific situation, ensuring that you maintain optimal eye health and visual function.

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