Floaters: Are Flashing Lights a Sign of Eye Fatigue? - Ophthalmology

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Flashing lights and floaters in your vision can be concerning, especially for someone with a history of myopia and floaters. Based on your description, it seems that you are experiencing phenomena that could be related to your existing floaters or possibly other visual disturbances.
Floaters are tiny specks or strands that float across your field of vision, often more noticeable when looking at a plain background, like a clear sky or a white wall. They are caused by changes in the vitreous humor, the gel-like substance that fills the eye, which can become more liquid and allow strands of collagen to form. This is a common occurrence, especially as people age, but it can also be exacerbated by conditions like high myopia.

The flashing lights you describe, particularly when you are looking at a fixed point or moving your eyes, could be a result of what is known as "photopsia." This phenomenon occurs when the retina is stimulated, either by movement of the vitreous gel or by other factors. In your case, it might be related to the vitreous pulling on the retina, which can happen with floaters. This pulling can create the sensation of flashes of light, especially during rapid eye movements or when transitioning from dark to light environments.

While your eye doctor has reassured you that your condition is benign and merely requires monitoring, it is essential to remain vigilant. If the flashes become more frequent, or if you experience a sudden increase in floaters, a curtain-like shadow in your vision, or any significant changes in your vision, you should seek immediate medical attention. These could be signs of retinal detachment, which is a serious condition that requires prompt treatment.

Regarding eye fatigue, it can indeed contribute to visual disturbances. Prolonged periods of focusing on screens or reading can lead to digital eye strain, which may cause symptoms such as blurred vision, dry eyes, and even temporary flashes or floaters. Taking regular breaks using the 20-20-20 rule—every 20 minutes, look at something 20 feet away for at least 20 seconds—can help alleviate some of this strain.

In summary, the flashing lights you are experiencing could be related to your floaters or eye fatigue. Since your previous examinations have indicated that your floaters are not a cause for concern, it is likely that what you are experiencing is a benign manifestation of these conditions. However, always trust your instincts; if something feels off or changes significantly, do not hesitate to consult your eye care professional for further evaluation. Regular check-ups are crucial, especially with your history of myopia and floaters, to ensure that your eye health remains stable.