Flashing Lights in Your Vision: What You Need to Know - Ophthalmology

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Flashes of light in the eyes?


Hello, doctor.
What does the sensation of flashes from a retinal tear feel like? Sometimes I feel like I see similar white lines when I quickly close my eyes; does that count as a flash, or is it only considered a flash when a very bright light suddenly appears in my field of vision?

Guo Xiansheng, 20~29 year old female. Ask Date: 2023/08/01

Dr. Gao Pilin reply Ophthalmology


Hello: Retinal tears are often accompanied by photopsia, which is typically described as the sensation of bright flashes or flickering lights.
These flashes tend to become more pronounced with eye movement or rapid blinking.
The occurrence of these flashes is due to the stimulation of retinal cells caused by the retinal tear or detachment, leading to abnormal signal transmission and resulting in changes in visual perception.
When flashes occur, they may sometimes be perceived as white lines or streaks of light, which could be a visual phenomenon resulting from the stimulation of specific areas of the retina.
It is important to note that different individuals may have varying sensations and descriptions; some may describe it as bright light flashes, while others may perceive lines or other shapes of light.
Rapid blinking can cause eye movement, which may also lead to vitreous traction on the retina, potentially resulting in additional flashes or line-like sensations.

Reply Date: 2023/08/01

More Info


Flashing lights in your vision can be a concerning symptom, and understanding what they mean is crucial for your eye health. The sensation of seeing flashes of light, often described as "flashing lights" or "photopsia," can occur for various reasons, and it is essential to differentiate between benign causes and those that may indicate a more serious condition, such as retinal detachment or retinal tears.

When you experience flashes of light, particularly if they are sudden and accompanied by other symptoms such as an increase in floaters (the "flying mosquitoes" you might see), it is important to seek medical attention. Flashes can be caused by the vitreous gel inside the eye pulling on the retina, which can happen as we age or due to myopia (nearsightedness). This pulling can create the sensation of light, which may appear as streaks, spots, or flashes in your peripheral vision.
In your case, you mentioned seeing white lines when you quickly close your eyes. This phenomenon could be related to the way light interacts with the retina and the optic nerve, especially if you are in a well-lit environment. However, this is different from the flashes associated with retinal issues. True flashes from retinal problems are typically described as bright, brief bursts of light that can occur in your peripheral vision, and they may resemble lightning or a camera flash. These flashes are not dependent on external light sources and can occur even in darkness.

If you are experiencing these flashes frequently or if they are accompanied by other symptoms such as a sudden increase in floaters, a shadow or curtain effect in your vision, or a significant decrease in vision, it is critical to consult an eye care professional immediately. These symptoms can indicate a retinal tear or detachment, which is a medical emergency that requires prompt treatment to prevent permanent vision loss.

In summary, while occasional flashes of light can be benign, especially if they are infrequent and not associated with other concerning symptoms, it is essential to monitor your vision closely. If you notice any changes or an increase in the frequency of these flashes, do not hesitate to seek an eye examination. Regular check-ups with your eye doctor are also advisable, especially if you have risk factors such as myopia or a family history of retinal issues. Taking these steps will help ensure your eye health and address any potential problems early on.

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