Circular Light Flashes in Vision: Causes and Concerns - Ophthalmology

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The phenomenon you are experiencing, characterized by circular light flashes in your vision, can be concerning, especially given your history of retinal detachment and high myopia. The presence of these circular light flashes, which you describe as resembling transparent floaters arranged in a circle, could be attributed to several underlying causes, primarily related to the vitreous body and retina.


Possible Causes
1. Vitreous Detachment: As we age or due to conditions like high myopia, the vitreous gel that fills the eye can begin to liquefy and pull away from the retina. This process can lead to the perception of flashes of light, especially when the vitreous tugs on the retina. The circular shape you describe may be due to the way the vitreous is interacting with the retina at the point of detachment.

2. Retinal Issues: Given your history of retinal detachment, it is crucial to consider that any new visual symptoms, such as light flashes or changes in vision, could indicate a potential issue with the retina. This could include retinal tears or further detachment, which can be serious and require immediate medical attention.

3. Afterimages or Visual Snow: Sometimes, the brain can create visual phenomena that are not directly related to the eye's physical condition. Afterimages can occur after looking at bright lights, and visual snow is a condition where individuals see a constant "static" in their vision. However, these are less likely to present as distinct circular flashes.

4. Migraine Aura: In some cases, visual disturbances can be associated with migraines, even in individuals who do not experience headache pain. This can manifest as various visual phenomena, including flashes of light or geometric shapes.


Recommendations
1. Immediate Evaluation: Given your history and the new onset of these symptoms, it is essential to seek an eye examination as soon as possible. An ophthalmologist can perform a thorough examination, including a dilated fundus exam, to assess the health of your retina and vitreous body.

2. Monitor Symptoms: Keep track of when these circular light flashes occur, their duration, and any accompanying symptoms (such as changes in peripheral vision, flashes of light, or an increase in floaters). This information can be valuable for your eye care provider.

3. Avoid Strain: While waiting for your appointment, try to minimize eye strain by taking regular breaks from screens and ensuring proper lighting while reading or working.

4. Stay Informed: Understanding your condition is vital. If you have concerns about your vision or the implications of your symptoms, do not hesitate to ask your healthcare provider for detailed explanations.


Conclusion
The circular light flashes you are experiencing could be related to vitreous changes or retinal issues, particularly given your medical history. It is crucial to address these symptoms promptly to rule out any serious conditions. Regular eye examinations and open communication with your eye care provider will help ensure that your vision remains stable and healthy. Remember, early detection and intervention are key in managing eye health, especially with a history of retinal issues.