Flashing Lights and Floaters in High Myopia Patients - Ophthalmology

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Experiencing floaters and seeing flashes of light when turning off the lights at night?


Hello Doctor, I have high myopia.
In February of this year, I was diagnosed with floaters at an ophthalmology clinic.
After a while, I noticed flashes of light in my vision.
I went to the hospital for an examination in early March, and there were no significant issues found, except that the retina on the right side is quite thin.
However, recently, when I turn off the lights at night and go to sleep, I experience persistent flashes of light in my eyes.
Even when I move my eyes, I see intermittent flashes that last for a few minutes before returning to normal.
What could be the cause of this? I just had an examination in early March, and if this keeps happening, will I have to keep going to the hospital? 😂

Kai, 10~19 year old female. Ask Date: 2022/03/30

Dr. Cai Wenyuan reply Ophthalmology


Observe the symptoms, and if they persist, seek medical evaluation.

Reply Date: 2022/03/30

More Info


Hello! It sounds like you are experiencing some concerning symptoms related to your high myopia, specifically the presence of floaters and flashing lights. These symptoms can indeed be alarming, especially for someone with a history of high myopia, which is known to increase the risk of certain eye conditions.

First, let’s clarify what floaters and flashing lights are. Floaters are tiny specks or strands that float in your field of vision, often more noticeable against a bright background. They are typically caused by changes in the vitreous gel that fills the eye as it ages or due to conditions like myopia. Flashing lights, on the other hand, can occur when the vitreous gel pulls on the retina, creating the sensation of light flashes. This is often referred to as "photopsia."
In your case, since you have been diagnosed with high myopia and have already been evaluated for retinal issues, it’s important to understand that while floaters and occasional flashes can be common in individuals with myopia, they can also indicate more serious conditions, such as retinal tears or detachments. The fact that your retina is thin is a point of concern, as thinner retinas can be more susceptible to complications.

Given that you recently had an eye examination in March and were told there were no significant issues, it’s understandable to feel hesitant about returning to the clinic. However, the persistence of your symptoms, especially the flashes occurring frequently and in conjunction with eye movement, warrants further evaluation. It’s crucial to monitor any changes in the frequency or intensity of these symptoms. If you notice an increase in the number of flashes, new floaters, or any changes in your vision (like a curtain or shadow over your vision), you should seek immediate medical attention.

In terms of managing your anxiety about these symptoms, it’s essential to maintain open communication with your eye care provider. They can provide reassurance and help you understand the nature of your symptoms. Regular follow-ups are vital, especially with your history of high myopia and the recent changes you’ve noticed.

Additionally, managing stress and anxiety can also have a positive impact on your overall well-being. Practices such as mindfulness, meditation, or even gentle exercises can help alleviate some of the stress associated with your eye health concerns. Ensuring you have a balanced diet rich in vitamins A, C, and E, along with omega-3 fatty acids, can also support eye health.

In summary, while floaters and occasional flashes can be normal, the persistence and frequency of your symptoms, especially with a background of high myopia and a thin retina, should not be ignored. It’s advisable to schedule a follow-up appointment with your eye doctor to reassess your condition. Regular monitoring and proactive management are key to maintaining your eye health and preventing potential complications. Don’t hesitate to reach out to your healthcare provider for any new or worsening symptoms. Your vision is important, and staying informed and proactive is the best approach.

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