Astigmatism: Symptoms and Effects on Vision - Ophthalmology

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Astigmatism issues?


Dr.
Tsai, I previously had an examination that showed I have irregular astigmatism (more in the upper part than the lower).
Recently, I've noticed that in areas above lights where I see shadows (the doctor previously mentioned that shadows are due to astigmatism), I see many colors, especially in bright or dark areas.
It's more pronounced when I'm not wearing my glasses.
I’m not sure if this is caused by astigmatism.
Thank you, doctor.

Bei Kun Rao De Ren, 10~19 year old female. Ask Date: 2019/02/07

Dr. Cai Wenyuan reply Ophthalmology


Hello: It is possible.
Please observe the situation, and if the symptoms persist, seek medical attention.
Wishing you safety and health.
Sincerely, Dr.
Tsai Wen-Yuan, Director of the Ophthalmology Department, Taoyuan General Hospital, Ministry of Health and Welfare.

Reply Date: 2019/02/07

More Info


Astigmatism is a common refractive error that occurs when the cornea or lens of the eye has an irregular shape. Instead of being perfectly round, the cornea may be more oval, leading to distorted or blurred vision at all distances. This condition can significantly affect visual clarity and comfort, and it is often accompanied by other symptoms such as eye strain, headaches, and difficulty seeing at night.

In your case, you mentioned having irregular astigmatism, which means that the curvature of your cornea is not uniform. This can lead to varying degrees of distortion in your vision, particularly in specific orientations, such as having more distortion in the upper part of your vision compared to the lower part. This unevenness can cause symptoms like double vision or ghosting, especially in low-light conditions or when looking at bright lights, which you described as seeing many colors or halos around lights.

The phenomenon of seeing colors or halos around lights, especially in dim lighting or when looking at bright sources, can indeed be related to astigmatism. When light enters the eye, it is refracted differently due to the irregular shape of the cornea or lens, causing the light to scatter. This scattering can create visual disturbances, such as halos or streaks of light, which are more pronounced in conditions of high contrast, like bright lights against a dark background.

Additionally, you mentioned experiencing floaters, which are small specks or threads that drift through your field of vision. Floaters are typically caused by changes in the vitreous gel that fills the eye and are common, especially as people age. While they are usually harmless, if you notice a sudden increase in floaters or flashes of light, it is essential to consult an eye care professional, as these could be signs of a more serious condition, such as retinal detachment.

To address your concerns about the relationship between your astigmatism and the visual symptoms you are experiencing, it is crucial to have regular eye examinations. An eye care professional can assess the degree of your astigmatism and determine the best corrective measures, which may include prescription glasses or contact lenses specifically designed to correct astigmatism. In some cases, refractive surgery may be an option if you are seeking a more permanent solution.

In summary, your symptoms of seeing colors and halos around lights, particularly in low-light conditions, are likely related to your irregular astigmatism. It is essential to continue monitoring your vision and consult with your eye care provider for appropriate management and treatment options tailored to your specific needs. Regular check-ups will help ensure that any changes in your vision are promptly addressed, allowing you to maintain optimal visual health.

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