Flashing Lights in Vision: Causes and Concerns - Ophthalmology

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Flashing lights in your vision can be a concerning symptom, especially when it occurs frequently or is accompanied by other visual disturbances. Based on your description, it seems that you are experiencing a phenomenon often referred to as "visual flashes." These flashes can manifest as brief bursts of light, similar to the flickering of a faulty light bulb, and can occur in one or both eyes.


Possible Causes of Flashing Lights
1. Vitreous Detachment: As we age, the vitreous gel that fills the eye can shrink and pull away from the retina. This process can cause flashes of light, particularly when the vitreous tugs on the retina. This is more common in individuals with myopia (nearsightedness), which you mentioned you have.

2. Retinal Issues: Although your retinal examination showed no issues, it’s important to note that conditions like retinal tears or detachments can also cause flashes. These conditions are serious and require immediate medical attention.

3. Migraine Aura: Some individuals experience visual disturbances, including flashes of light, as part of a migraine aura. This can occur even without a headache.

4. Eye Fatigue: Prolonged periods of focusing on screens, especially during exam times, can lead to eye strain or fatigue, which may contribute to visual disturbances. This is often exacerbated by inadequate lighting or prolonged screen time without breaks.

5. Optical Illusions: Sometimes, the brain can misinterpret signals from the eyes, especially in low-light conditions, leading to the perception of flashes or flickers.


Concerns and Recommendations
Given that you have recently increased your screen time due to exams, it’s possible that your symptoms are related to eye strain. However, since you are experiencing these flashes both at night and during the day, it is crucial to monitor the situation closely. Here are some recommendations:
- Follow-Up with an Eye Specialist: Since you have already seen a doctor, it may be beneficial to schedule a follow-up appointment, especially if the symptoms persist or worsen. A thorough examination, including a dilated fundus exam, can help rule out any underlying issues.

- Reduce Screen Time: Implement the 20-20-20 rule: every 20 minutes, take a 20-second break and look at something 20 feet away. This can help reduce eye strain.

- Proper Lighting: Ensure that your study area is well-lit to minimize strain on your eyes. Avoid working in dim light, as this can exacerbate visual disturbances.

- Stay Hydrated and Rested: Fatigue and dehydration can also contribute to visual symptoms. Ensure you are getting adequate rest and hydration, especially during stressful periods like exams.

- Stress Management: Anxiety and stress can heighten your awareness of visual disturbances. Consider relaxation techniques such as deep breathing, meditation, or gentle eye exercises.


Conclusion
While flashing lights in your vision can be benign, especially in the context of increased screen time and stress, it is essential to remain vigilant. If you notice any changes in your vision, such as an increase in the frequency or intensity of the flashes, or if you experience other symptoms like a sudden loss of vision, it is crucial to seek immediate medical attention. Regular eye examinations are important, particularly for individuals with myopia, to ensure that any potential issues are caught early.