Flashing Lights in Vision: Causes and Concerns - Ophthalmology

More Info

---

Flashing lights in vision can be a concerning symptom, especially for individuals with existing eye conditions such as myopia (nearsightedness) and astigmatism. Given your history of high myopia (around 500-600 degrees) and elevated intraocular pressure (19-20 mmHg), it's essential to understand the potential causes and implications of these visual disturbances.


Understanding Flashing Lights
Flashing lights or photopsia can occur due to various reasons, often related to changes within the eye. Here are some common causes:
1. Vitreous Detachment: In individuals with high myopia, the vitreous gel that fills the eye can become more liquid and may detach from the retina. This can lead to flashes of light, particularly when the vitreous pulls on the retina.

2. Retinal Issues: Although you mentioned that your optic nerve appears healthy, it's still crucial to consider retinal health. Flashes can sometimes indicate retinal tears or detachments, especially in high myopia cases. Regular eye examinations are vital to monitor for these conditions.

3. Migraine Aura: Some individuals experience visual disturbances, including flashing lights, as part of a migraine aura, even without the headache. This phenomenon can occur independently of any underlying eye condition.

4. Ocular Hypertension: Elevated intraocular pressure can lead to various visual symptoms, although it is not always directly linked to flashes. It is essential to manage this condition to prevent potential complications like glaucoma.

5. Eye Fatigue: Prolonged use of screens or focusing on tasks can lead to eye strain, which might cause temporary visual disturbances, including flashes or afterimages.


Your Specific Situation
In your case, the flashes occurring during physical exertion or after tightly closing your eyes could be related to the mechanical stress on the vitreous or retina. When you exert yourself, the pressure changes within the eye can lead to transient visual phenomena. The absence of floaters (like the "flying mosquitoes" you mentioned) is a positive sign, as floaters often accompany more serious conditions like retinal tears.


Recommendations
1. Regular Eye Exams: Continue with your scheduled eye examinations, especially given your high myopia and elevated eye pressure. Regular monitoring can help catch any potential issues early.

2. Monitor Symptoms: Keep a log of when the flashes occur, their duration, and any associated activities (like physical exertion or eye strain). This information can be valuable for your eye care provider.

3. Limit Eye Strain: If you spend long hours on the computer or doing close work, take regular breaks to reduce eye fatigue. The 20-20-20 rule is helpful: every 20 minutes, look at something 20 feet away for at least 20 seconds.

4. Seek Immediate Care if Necessary: If you experience a sudden increase in flashes, new floaters, or a shadow or curtain effect in your vision, seek immediate medical attention. These could be signs of a retinal tear or detachment, which require prompt treatment.

5. Discuss Concerns with Your Eye Doctor: If you have ongoing concerns about your symptoms, don't hesitate to discuss them with your eye doctor. They can provide reassurance and may recommend additional tests if needed.


Conclusion
While flashing lights in your vision can be alarming, understanding the potential causes can help alleviate some concerns. Given your existing eye conditions, maintaining regular check-ups and being vigilant about any changes in your vision is crucial. Always prioritize your eye health, and don't hesitate to seek professional advice when needed.