Flickering Shadows in Your Right Eye: Causes and Solutions

Flashing black shadows in the corner of the right eye?

In the past week, I have been experiencing frequent flickering black spots (or possibly flashes) in the upper right area of my right eye.
It resembles the flickering light effect caused by ceiling fans in old buildings.
Initially, it occurred about five times a day, but it has been happening more frequently.
I visited an ophthalmology clinic for a dilated eye exam, and the doctor mentioned that my retina appeared slightly cloudy, but my vision had not worsened, and everything else was normal.
They prescribed a soothing eye drop solution.
However, after using the drops for three days, I feel that my symptoms have not improved, and the flickering has become more frequent.
Since I have been using my phone and computer screens more often lately, I would like to know if this could be the cause of my symptoms, or if there are any other recommended remedies? (My right eye has a vision of over 300, while my left eye is 600 degrees.
I usually wear glasses but rarely wear contact lenses.)

Niming, 20~29 year old female. Ask Date: 2021/08/11

Dr. He Jianxian reply Ophthalmology

Your description resembles photopsia, which is caused by traction on the retina.
This phenomenon will disappear once the traction on the retina ceases.
If you have already undergone a dilated fundus examination, you can generally feel reassured.
However, if you experience an increase in the frequency of flashes or a significant increase in floaters, or if you notice any visual field defects or distortion of objects, this may be a sign of serious complications, and you should seek an ophthalmological evaluation as soon as possible.
Dr.
He Jianxian, Department of Ophthalmology, Nantou Hospital.

Reply Date: 2021/08/11

More Info

Flickering shadows or flashes of light in your vision can be concerning, especially when they become frequent or persistent. Based on your description, it sounds like you are experiencing a phenomenon that could be related to several underlying causes.
Firstly, the flickering shadows you are noticing could be a result of a condition known as "visual floaters" or "photopsia." Floaters are tiny specks or strands that float in your field of vision, often caused by changes in the vitreous gel that fills the eye. As we age, the vitreous can shrink and pull away from the retina, leading to the perception of these floaters. Photopsia, on the other hand, refers to flashes of light that can occur when the retina is stimulated, either by movement or pressure. This can happen if the vitreous gel pulls on the retina, causing it to send signals to the brain that are interpreted as light.

Given that you have already undergone a dilated eye exam and the doctor noted some retinal cloudiness but did not find any serious issues, it is reassuring that no immediate threats were identified. However, the increasing frequency of these flickering sensations is something to monitor closely. If you experience any additional symptoms such as a sudden increase in floaters, flashes of light, or any loss of peripheral vision, it is crucial to seek immediate medical attention, as these could be signs of retinal detachment or other serious conditions.

Regarding your concern about screen time, excessive use of digital devices can lead to digital eye strain, which may exacerbate visual disturbances. Symptoms of digital eye strain include dry eyes, blurred vision, and discomfort, which can sometimes manifest as flickering or shadowy images. To alleviate these symptoms, consider implementing the 20-20-20 rule: every 20 minutes, take a 20-second break to look at something 20 feet away. This helps reduce eye fatigue and strain.

In addition to managing screen time, ensure that your eyeglass prescription is up to date. Wearing the correct prescription can significantly improve your visual clarity and comfort. If you have not had an eye exam in a while, it may be beneficial to schedule one to ensure that your vision is being adequately corrected.

Furthermore, maintaining overall eye health is essential. This includes staying hydrated, eating a balanced diet rich in vitamins A, C, and E, and omega-3 fatty acids, which are beneficial for eye health. Regular exercise and protecting your eyes from UV light by wearing sunglasses outdoors can also contribute to long-term eye health.

In summary, while your symptoms may be benign, it is essential to remain vigilant and consult with your eye care professional if your condition worsens or if new symptoms arise. Keeping track of your symptoms and any potential triggers can also provide valuable information for your healthcare provider. Regular eye exams are crucial for monitoring your eye health, especially given your history of refractive error and the recent changes in your vision.

Similar Q&A

Understanding Flickering Shadows in Peripheral Vision: Causes and Concerns

Hello, Doctor. Recently, while reading, I noticed flickering lines or shadows in my right eye at certain angles, but I can't see them when I'm not reading. I have my desk lamp positioned directly in front of me, and when I turn it off at the same angle, I still can'...

Dr. Wang Zhangji reply Ophthalmology
Most cases are caused by vitreous opacities, and regular check-ups are necessary to prevent serious issues.

Understanding Shadows in Your Vision: Possible Causes and Concerns

Hello, I have recently noticed that when I wake up in the morning and my eyes are slightly open, there is a dark shadow on the right side of my right eye (not a floater). When I look straight ahead, the shadow is in the center, and when I look to the left, it shifts to the left. ...

Dr. He Jianxian reply Ophthalmology
This is not glaucoma; however, based on your description, it is difficult to determine what the condition might be. I recommend that you visit an ophthalmologist for a proper examination to identify any issues.

Understanding Gray Shadows in Vision: Possible Causes and Concerns

A few nights ago, I suddenly noticed two stationary gray shadows appearing to the right of the central vision in my right eye. I am very concerned because I previously had a retinal detachment in that eye, which was treated with a scleral buckle surgery. I immediately went to the...

Dr. He Jianxian reply Ophthalmology
The most common condition is still floaters. As long as a dilated eye exam confirms that there are no significant abnormalities, there is usually no cause for concern.

Flashing Lights in the Corner of Right Eye: Causes and Concerns

Hello, Doctor. About two months ago, I started noticing flashes of light when I stared at a white wall ("bright" area). When I blink, I see flashes (lines that resemble mountain peaks; when I look to the right, they straighten out, and when I look straight ahead, they a...

Dr. Gao Pilin reply Ophthalmology
Hello Mr. Yu: Based on your description, this phenomenon is caused by vitreous degeneration, which can persist for a long time. If the fundus examination shows no issues, the best course of action is to coexist with it peacefully. However, if there are any unusual changes, please...