Flashing Lights in Vision: Possible Causes and Concerns - Ophthalmology

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Flashing lights in vision can be a concerning symptom, especially when they appear suddenly or change in nature. Based on your description, it seems you are experiencing a phenomenon that could be related to several underlying causes. Let's break down the possible reasons for your symptoms and what you should consider moving forward.

1. Vitreous Detachment: Given your history of myopia (nearsightedness), you may be experiencing symptoms related to vitreous detachment. The vitreous is a gel-like substance that fills the eye, and as we age or due to high myopia, it can begin to pull away from the retina. This can cause flashes of light, often described as "lightning streaks" or "flashes," especially when moving your eyes or changing positions. The fact that these flashes occur when you close your eyes or are in low-light conditions may suggest that the vitreous is tugging on the retina, which can be more noticeable in these situations.

2. Retinal Issues: While your previous eye examinations did not reveal any significant issues, it is crucial to remain vigilant. Flashes of light can sometimes indicate more serious conditions, such as retinal tears or detachments. If you experience an increase in the frequency or intensity of these flashes, or if you notice new floaters or a shadow in your peripheral vision, you should seek immediate medical attention.

3. Visual Migraines: Another possibility is that you are experiencing visual migraines, which can cause temporary visual disturbances, including flashes of light or zigzag patterns. These are usually not associated with pain and can resolve on their own. However, they can be alarming, especially if you have not experienced them before.

4. Photopsia: The term "photopsia" refers to the perception of flashes of light that are not caused by external light sources. This can be due to various factors, including retinal stimulation or irritation. If you have been exposed to bright light, such as sunlight after using dilating drops, this could also contribute to your symptoms.

5. Eye Fatigue: Prolonged screen time and eye strain can lead to temporary visual disturbances. If you spend long hours in front of a computer, it may lead to symptoms like visual fatigue, which can manifest as flashes or other visual anomalies.

Given that your symptoms have persisted for three months without significant changes in your vision or an increase in floaters, it is reassuring that you have not experienced any severe headaches or other alarming symptoms. However, it is essential to monitor your condition closely. If the flashes become more frequent, if you notice any changes in your vision, or if you develop new symptoms, you should consult an eye care professional for a thorough examination.

In conclusion, while your symptoms may not currently indicate a severe issue, it is vital to remain proactive about your eye health. Regular eye exams, especially with a history of myopia and any new visual symptoms, are crucial. If you have concerns about your vision or if your symptoms change, do not hesitate to seek further evaluation from an ophthalmologist. They can provide a comprehensive assessment and determine if any treatment or intervention is necessary.