Floaters and Flashing Lights: When to Seek Eye Care - Ophthalmology

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Hello Doctor: I started experiencing symptoms of floaters around January of this year.
Since then, I have undergone 10 dilated eye examinations because new symptoms keep appearing, which makes me anxious and leads me to visit different clinics (I have had two visits to the same clinic, but I felt that the doctors and nurses were not very friendly due to my frequent visits).
Currently, the floaters I see are mainly transparent, with occasional small black dots appearing when I am more tired, but this happens infrequently.
I also experienced flashes of light; around early May, I noticed a suspected arc-shaped white light in the upper part of my left eye.
However, after dilation, the doctor said that the retina in that area is just thinner (lattice degeneration) and there were no tears or holes observed.
I would like to ask the doctor: 1.
If examinations show no tears or holes, despite having high myopia (approximately -10.00 to -11.00 diopters in both eyes) and a thinner peripheral retina, doctors have said that laser treatment is not necessary, and several clinics have confirmed this.
Is this correct? I found online that some people suggest preventive laser treatment.
Should I seek a second opinion from other doctors? I have also consulted a retinal specialist at a large hospital in between.
2.
Besides the floaters and occasional flashes, I also see many light spots moving around when looking at the sky or a light background, which I read online is called the Scheerer's phenomenon.
However, in the past few days, while walking outdoors, I have noticed very small light spots suddenly appearing but disappearing immediately.
I am unsure if I just didn't notice them before or if they are a new symptom.
This week, they have appeared once a day, with no specific eye affected—sometimes the left eye, sometimes the right eye—but the spots are very tiny and white.
Sometimes I don’t see them at all throughout the day.
Should I undergo dilation again soon? I am really scared...
and I am wondering if this is related to dry eyes or the movement of vitreous floaters.
Thank you, Doctor.

Xu, 20~29 year old female. Ask Date: 2024/06/09

Dr. Gao Pilin reply Ophthalmology


Hello:
1.
Examination Results and Laser Treatment: If multiple dilated eye examinations have not revealed any retinal tears or holes, despite having high myopia and thinner peripheral retina, there is a valid reason why your doctor has not recommended laser treatment.
Preventive laser therapy is primarily aimed at cases with existing tears or those at high risk.
Retinal specialists typically decide on the necessity of such treatment based on specific examination results.
If several doctors, including retinal specialists from major hospitals, agree that preventive laser treatment is unnecessary, this recommendation is likely based on their professional assessment and clinical experience.
2.
Floaters and Flashes: Floaters and occasional flashes, especially arc-shaped white lights, may be related to vitreous degeneration or lattice degeneration of the retina.
These symptoms are more common in patients with high myopia.
If the dilated examination does not reveal any new issues, these symptoms may simply be part of normal vitreous degeneration.
As for the phenomenon of light spots moving erratically, it is indeed the Scheerer's phenomenon, which is a normal visual occurrence and should not be overly concerning.
The light spot phenomenon and the erratic movement of light spots you mentioned, as well as small light spots seen outdoors, while these phenomena may occasionally occur, are generally harmless unless accompanied by other symptoms such as sudden vision loss or visual field defects.
3.
Need for Repeat Dilation: If your symptoms have not significantly changed or worsened, such as a sudden increase in floaters or persistent flashes, there may not be an immediate need for another dilated examination.
However, if you still feel very anxious or if your symptoms have changed significantly, it is advisable to return to an ophthalmologist for further evaluation to ensure everything is fine.
4.
Dry Eye and Vitreous Floaters: Dry eye syndrome can cause some visual discomfort, but it is unlikely to cause the light spot phenomenon you described.
The movement of vitreous floaters may lead to changes in floaters.
Adequate rest and eye care can help reduce the impact of dry eye symptoms.

In summary, your condition sounds relatively stable.
If multiple examinations have consistently shown no retinal tears or holes, there is currently no need for preventive laser treatment.
Should new symptoms arise or if symptoms significantly worsen, please return to an ophthalmologist for the most accurate assessment and recommendations.
I hope this information helps alleviate some of your anxiety, and remember to keep up with regular check-ups and pay attention to your eye health.
If you have more questions or new symptoms, feel free to visit an ophthalmologist.
Wishing you good health!

Reply Date: 2024/06/09

More Info


When it comes to experiencing floaters and flashing lights in your vision, it's important to understand the underlying causes and when to seek professional eye care. Based on your description, you have been experiencing floaters since January, along with occasional flashes of light, particularly in low-light conditions. You also mentioned having undergone multiple dilated eye examinations, which is a proactive approach to monitoring your eye health, especially given your history of high myopia (nearsightedness).


Understanding Floaters and Flashes
Floaters are small specks or strands that drift through your field of vision, often more noticeable against bright backgrounds. They are typically caused by changes in the vitreous gel that fills the eye, which can become more liquid and form clumps or strands as we age. In your case, with a history of high myopia, the likelihood of experiencing floaters increases due to the structural changes in the eye.

Flashes of light, on the other hand, can occur when the vitreous gel pulls on the retina, which is the light-sensitive layer at the back of the eye. This pulling can stimulate the retina and create the sensation of seeing flashes or streaks of light. While occasional flashes can be benign, they can also indicate more serious conditions, such as retinal tears or detachments, especially in individuals with high myopia.


When to Seek Eye Care
1. Persistent Symptoms: If you notice a sudden increase in the number of floaters or flashes, or if you experience new symptoms such as a shadow or curtain effect in your vision, it is crucial to seek immediate medical attention. These could be signs of retinal detachment, which is a medical emergency.

2. Regular Monitoring: Since you have undergone multiple eye examinations and have been told that there are no retinal tears or holes, it is reassuring. However, given your high myopia, it is wise to continue regular check-ups with an eye care professional. They can monitor any changes in your retina and vitreous over time.

3. Consulting Specialists: If you feel uncertain about the assessments you've received, it is perfectly reasonable to seek a second opinion, especially from a retinal specialist. They can provide more specialized insights into your condition and discuss the potential need for preventive measures, such as laser treatment, if deemed necessary.


Addressing Your Concerns
1. Preventive Laser Treatment: The decision to perform preventive laser treatment is typically based on the presence of certain risk factors, including the condition of the retina and the presence of any tears or holes. If multiple specialists have assessed your retina and found no significant issues, it may be appropriate to monitor your condition rather than pursue unnecessary interventions.

2. Visual Phenomena: The small white dots you see, especially against bright backgrounds, could indeed be related to the phenomenon known as "Scheerer's phenomenon," which is often benign. However, if these symptoms are new or increasing in frequency, it may warrant further investigation.

3. Dry Eyes and Vitreous Changes: Your symptoms could also be exacerbated by dry eyes or changes in the vitreous gel. Ensuring proper hydration, using artificial tears, and taking regular breaks from screens can help alleviate some discomfort.


Conclusion
In summary, while floaters and flashes can be concerning, they are often benign, especially if accompanied by regular eye examinations that show no significant retinal issues. However, vigilance is key, and any new or worsening symptoms should prompt immediate consultation with an eye care professional. It's essential to maintain open communication with your healthcare providers and advocate for your eye health, ensuring that you receive the best possible care tailored to your specific needs.

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