Flashing Lights in the Corner of Your Eye - Ophthalmology

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Flashes of light in the peripheral vision?


Hello, doctor: Recently, I have noticed that when I look at the wall and then shift my gaze upward and forward, I see several flashes of light in the outer corner of my right eye.
I had a fundus examination done recently, which did not reveal any issues, and it has been over a month since I had laser treatment on my right eye.
What could this problem be? Thank you, doctor.

Niming, 20~29 year old female. Ask Date: 2022/02/11

Dr. He Jianxian reply Ophthalmology


Eye movements can sometimes cause the vitreous to pull on the retina, leading to the appearance of flashes of light.
If a retinal examination has been performed and no issues were found, there is generally no cause for concern.
Dr.
Ho Chien-Hsien, Department of Ophthalmology, Nantou Hospital.

Reply Date: 2022/02/11

More Info


Flashing lights in the corner of your eye can be concerning, especially if you have a history of eye issues or have recently undergone laser treatment. Based on your description, there are several potential explanations for the phenomenon you are experiencing.

1. Posterior Vitreous Detachment (PVD): This is a common condition, especially in individuals who have undergone laser treatment or are older. The vitreous gel that fills the eye can shrink and pull away from the retina, leading to flashes of light. These flashes are often described as brief, bright spots or streaks of light, particularly when you move your eyes or change your head position. PVD is usually benign, but it can sometimes lead to more serious conditions, such as retinal tears or detachment.

2. Retinal Issues: Although your recent eye exam did not reveal any problems, it is essential to remain vigilant. Flashes of light can indicate that the retina is being stimulated or irritated. If the flashes 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, you should seek immediate medical attention. These could be signs of retinal detachment, which is a medical emergency.

3. Migraine-Related Visual Disturbances: Even if you do not have a history of migraines, some individuals experience visual disturbances known as "aura" that can include flashing lights. These symptoms can occur without a headache and may be triggered by various factors, including stress, fatigue, or changes in light exposure.

4. Eye Fatigue or Strain: If you have been spending extended periods looking at screens or focusing intently on tasks, eye strain could lead to temporary visual disturbances, including flashes. This is often accompanied by other symptoms like dryness, discomfort, or headaches.

5. Other Causes: Conditions such as dry eye syndrome, inflammation in the eye, or even systemic issues like hypertension or diabetes can also contribute to visual disturbances.
Given that you have had laser treatment recently, it is crucial to monitor your symptoms closely. If the flashes persist, increase in frequency, or are accompanied by other visual changes, it is advisable to return to your eye care provider for a thorough evaluation. They may perform additional tests, such as a dilated eye exam or imaging studies, to assess the health of your retina and vitreous.

In the meantime, here are some general recommendations to help manage your eye health:
- Limit Screen Time: Take regular breaks when using screens to reduce eye strain. The 20-20-20 rule is helpful: every 20 minutes, look at something 20 feet away for at least 20 seconds.

- Stay Hydrated: Ensure you are drinking enough water, as dehydration can exacerbate dry eye symptoms.

- Use Artificial Tears: If you experience dryness, over-the-counter artificial tears can help lubricate your eyes.

- Protect Your Eyes: Wear sunglasses to shield your eyes from bright lights and glare, especially after being in dark environments.

In conclusion, while occasional flashes of light can be benign, it is essential to remain vigilant, especially following recent eye procedures. If you have any concerns or if your symptoms change, do not hesitate to seek professional medical advice. Your eye health is paramount, and timely intervention can prevent potential complications.

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