Floaters: Common Concerns and Eye Health Tips

Inquiry about floaters?

Hello Dr.
Tsai, I currently have a prescription of -4.75 diopters in my left eye and -4.50 diopters in my right eye.
In May, I suddenly noticed the presence of floaters in my vision.
I immediately went to a clinic for an examination, and they said there was no issue.
However, by August, I noticed an increase in the number of floaters, so I often check the quantity by looking at white walls and the blue sky.
I found that both eyes have several floaters, and each has a large clump of debris that often floats quickly and then disappears.
Sometimes (for as short as two to three days and as long as one to two weeks), when looking at a white wall, I see a small point of white light (a dot, not lightning-shaped).
I would like to ask the doctor:
1.
Does frequently looking at white walls and the blue sky harm the eyes? After looking at the blue sky for too long, I notice a red ghosting effect in my central vision; what could be the reason for that?
2.
What should I pay attention to if I see small white lights? If it were retinal detachment, what would I see?
3.
Does dilating the pupils help slow down vitreous degeneration?
4.
For patients with floaters, how many floaters in the eye are considered normal?
Thank you, Dr.
Tsai, for your hard work.

Niming, 10~19 year old female. Ask Date: 2022/08/11

Dr. Cai Wenyuan reply Ophthalmology

1.
It is considered a normal phenomenon.
2.
Seek medical examination.
3.
Cannot.
4.
No relevant information.

Reply Date: 2022/08/11

More Info

Floaters, or "flying spots," are a common visual phenomenon that many people experience, especially those with myopia (nearsightedness) or other eye conditions. Your concerns about floaters, particularly given your prescription of -475 in the left eye and -450 in the right eye, are valid. Let's address your questions one by one.

1. Is it harmful to frequently look at white walls or the blue sky?
Looking at a uniform surface like a white wall or the blue sky is generally not harmful to your eyes. However, if you find yourself staring at these surfaces for extended periods, it can lead to eye strain, especially if you are not blinking enough. This can exacerbate symptoms of dry eyes or discomfort. The phenomenon of seeing a red ghost image after looking at a bright blue sky could be due to temporary afterimages or a phenomenon called "persistence of vision," where your retina continues to perceive the bright light even after you look away. It’s essential to take regular breaks and practice the 20-20-20 rule: every 20 minutes, look at something 20 feet away for at least 20 seconds.

2. What should I be aware of if I see small white lights?
The appearance of small white lights or flashes can be concerning. These could be related to the vitreous gel in your eye pulling away from the retina, which is common as we age. However, if you experience a sudden increase in floaters, flashes of light, or a shadow or curtain effect in your peripheral vision, these could be signs of retinal detachment or other serious conditions. In such cases, you should seek immediate medical attention. Retinal detachment often presents with a sudden increase in floaters, flashes of light, and a shadow or curtain over part of your vision.

3. Can dilating drops help slow down vitreous degeneration?
Currently, there is no evidence to suggest that dilating drops can slow down vitreous degeneration. These drops are primarily used to allow the eye doctor to get a better view of the retina and other internal structures of the eye. Vitreous degeneration is a natural part of aging and is not something that can be prevented or reversed with medication. Regular eye examinations are crucial to monitor any changes in your eye health.

4. How many floaters are considered normal for someone with floaters?
The number of floaters can vary significantly from person to person. Some individuals may have just a few, while others may notice many more. Generally, if the floaters are stable and not increasing rapidly, they are often considered benign. However, if you notice a sudden increase in the number of floaters or any changes in your vision, it is essential to consult with an eye care professional for a thorough examination.

In summary, while floaters are common and often harmless, any sudden changes in your vision should be taken seriously. Regular eye check-ups are essential, especially for individuals with myopia or other risk factors for retinal issues. Maintaining good eye health through proper hydration, a balanced diet rich in antioxidants, and protecting your eyes from excessive UV exposure can also be beneficial. If you have any further concerns or notice changes in your symptoms, do not hesitate to reach out to your eye care provider.

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