Floaters and Flashes: Common Retinal Concerns Explained - Ophthalmology

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Floaters and flashes?


Hello Doctor, I previously inquired about your article #173265 and would like to ask you some questions.
(1) What is retinal discharge? (2) Regarding my earlier fourth question, I experience this phenomenon with my eyes both closed and open, where the light streaks and spots are persistent but disappear after a while.
Could you please tell me if my symptoms are considered flashes? (3) Following up on the previous question, is this normal or abnormal retinal discharge? Thank you, Doctor 😊!

Kkk, 20~29 year old female. Ask Date: 2021/09/12

Dr. Gao Pilin reply Ophthalmology


1.
Vitreous traction causes an electrophysiological response in the retina, resulting in the perception of flashes of light.

2.
The electrophysiological response induced by traction on the retina is not a response to light stimulation, so even with the eyes closed and in the absence of light, one may still experience the sensation of flashes.

3.
If vitreous traction occurs without any retinal tears, it is generally not a concern; however, close monitoring of any changes is necessary.
If any unusual phenomena arise, medical evaluation should be sought.

Reply Date: 2021/09/12

More Info


Understanding floaters and flashes is crucial for maintaining eye health, especially as these phenomena can sometimes indicate underlying retinal issues. Let's address your questions in detail.

1. What is retinal discharge?
Retinal discharge, often referred to in a clinical context as "retinal activity," can be a bit misleading. It typically describes the electrical activity of the retina, which is responsible for processing visual information. When we talk about "flashes," we are usually referring to the sensation of seeing light or flashes of light that are not actually present in the environment. This phenomenon occurs when the retina is stimulated, either by physical traction (like from the vitreous gel pulling on the retina) or by other means. In some cases, it can be associated with retinal detachment or other serious conditions, so it’s essential to monitor these symptoms closely.

2. Are the persistent light streaks and points I see with my eyes open and closed considered flashes?
The symptoms you describe—persistent light streaks or points—can indeed be classified as flashes, especially if they occur in response to changes in eye position or pressure. Flashes are typically brief and can be triggered by movement or changes in light. However, if these sensations are continuous or last longer than a few seconds, they may not fit the classic definition of flashes. Instead, they could be related to other visual phenomena, such as afterimages or visual snow, which can occur due to various reasons, including retinal or neurological conditions.
3. Is this normal or abnormal retinal discharge?
The presence of flashes or light streaks can be normal, especially in individuals with a history of floaters or vitreous changes. However, if these symptoms are new, increasing in frequency, or accompanied by other visual disturbances (like a sudden increase in floaters, shadows in your vision, or a curtain-like effect), it is crucial to seek immediate evaluation by an eye care professional. These could be signs of retinal tears or detachment, which require prompt attention to prevent permanent vision loss.


Additional Considerations
Given your concerns about floaters and flashes, it's essential to understand the context in which these symptoms arise. Floaters are often benign and result from age-related changes in the vitreous gel of the eye. However, when they are accompanied by flashes, it raises the need for further investigation.
Regular Eye Exams: Regular check-ups with an ophthalmologist are vital, especially if you notice changes in your symptoms. They can perform a comprehensive dilated eye exam to assess the health of your retina and vitreous.

Lifestyle Factors: Maintaining a healthy lifestyle can also support eye health. This includes protecting your eyes from UV light, managing systemic conditions like diabetes and hypertension, and ensuring you have a balanced diet rich in antioxidants.

When to Seek Help: If you experience a sudden increase in floaters, flashes, or any other significant changes in your vision, it’s essential to seek medical attention promptly. Early detection and treatment of retinal issues can significantly improve outcomes.

In conclusion, while floaters and flashes can be common and benign, they warrant careful monitoring. Understanding the nature of your symptoms and maintaining regular eye care can help ensure your vision remains healthy. If you have any further questions or concerns, don't hesitate to reach out to your eye care provider.

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