Flashing Lights in the Corner of Your Eye When Blinking - Ophthalmology

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Flashing lights in the corner of your eye, especially when blinking or squeezing your eyes shut, can be concerning, but it’s important to understand the underlying mechanisms and potential causes. Based on your description, it seems that you experience a small, circular flash of light in the upper left corner of your left eye whenever you blink forcefully. This phenomenon is not uncommon and can be attributed to several factors.


Possible Causes
1. Vitreous Detachment: The vitreous is a gel-like substance that fills the eye. As we age, it can shrink and pull away from the retina, leading to flashes of light. This is often described as seeing "lightning" or "flashes" in the peripheral vision. Although you mentioned that your retina was checked and found to be healthy, it’s still possible to experience these flashes due to vitreous changes.

2. Retinal Issues: While your retina was reported as healthy, it’s essential to be vigilant. Flashes can sometimes indicate retinal tears or detachments, especially if they are accompanied by other symptoms like a sudden increase in floaters or a shadow in your vision. Regular check-ups with an eye care professional are crucial if you have a history of eye problems.

3. Ocular Migraines: Even if you do not have a history of migraines, some individuals experience visual disturbances known as ocular migraines. These can manifest as flashing lights or zigzag patterns in the vision, often resolving within a short period.
4. Photopsia: This term refers to the perception of flashes of light that are not caused by external light sources. It can occur due to various reasons, including retinal irritation or pressure on the eye.

5. Eye Strain: If you spend long hours in front of screens or engage in activities that require intense focus, you may experience eye strain, which can lead to temporary visual disturbances, including flashes of light.


Recommendations
1. Follow-Up with an Eye Specialist: Since you have already undergone a dilated eye exam, it’s advisable to maintain regular follow-ups, especially if the flashes persist or change in nature. An eye specialist can conduct a thorough examination and possibly perform imaging tests to rule out any underlying issues.

2. Monitor Symptoms: Keep track of any additional symptoms that may arise, such as changes in vision, increased floaters, or any new visual disturbances. If you notice any significant changes, seek medical attention promptly.

3. Reduce Eye Strain: If you spend a lot of time on screens, ensure you take regular breaks using the 20-20-20 rule: every 20 minutes, look at something 20 feet away for at least 20 seconds. This can help reduce eye strain and may alleviate some of the symptoms you are experiencing.

4. Stay Hydrated and Rested: Ensure you are well-hydrated and getting adequate sleep, as fatigue and dehydration can exacerbate eye strain and discomfort.

5. Consider Environmental Factors: Bright lighting can sometimes enhance the perception of flashes. If you notice that these flashes are more pronounced in bright environments, consider adjusting your lighting or wearing sunglasses to reduce glare.


Conclusion
While experiencing flashes of light in your vision can be alarming, it is often benign, especially if your retina has been examined and found to be healthy. However, it’s essential to remain vigilant and proactive about your eye health. Regular check-ups and monitoring your symptoms will help ensure that any potential issues are addressed promptly. If you have any further concerns or if your symptoms change, do not hesitate to reach out to your eye care provider for further evaluation.