New Floaters and Flashes in Seoul: When It Could Be a Retinal Tear or Detachment
Quick answer: A few harmless floaters can happen with age, but a sudden shower of new floaters, repeated flashes, a dark curtain or shadow, or a drop in vision needs an urgent dilated retinal examination. In Seoul, patients from Guro, Gasan, Geumcheon, Yeongdeungpo, Gwanak, Sillim, Sindaebang and Dongjak can contact Nunehim Eye Center for Korean or English guidance.
This guide explains what new floaters and flashes can mean, how doctors check the retina, and what to do today if symptoms begin. It is educational information, not a diagnosis.
Why new floaters and flashes matter
Floaters are spots, threads or cobweb-like shapes that move when your eyes move. Flashes are brief arcs or flickers of light, often at the edge of vision. They can appear when the clear gel inside the eye, called the vitreous, changes or separates from the retina.
The common age-related process is a posterior vitreous detachment (PVD). Many PVDs do not damage the retina. However, vitreous traction can create a retinal tear. Fluid can then pass through the tear and lift the retina, causing a retinal detachment. A retinal tear or detachment can threaten sight if treatment is delayed.
Practical point: Symptoms alone cannot reliably tell a harmless PVD from a retinal tear. The safest next step is a prompt, dilated examination of the peripheral retina.
Common causes: a plain-language comparison
| Possible cause | Typical symptoms | Recommended action | What an eye exam checks |
|---|---|---|---|
| Age-related PVD | New floater or flashes; vision often remains clear | Arrange a prompt dilated exam, even if symptoms settle | Retina for traction, tears and bleeding |
| Retinal tear | Sudden increase in floaters or flashes; sometimes a small blind spot | Same-day urgent assessment | Peripheral retina, often with indirect ophthalmoscopy and scleral depression |
| Retinal detachment | Dark curtain, spreading shadow, missing side vision or reduced sight | Emergency retinal service immediately | Extent and location of detachment; ultrasound or OCT when needed |
| Migraine visual aura | Shimmering or zig-zag pattern that develops over minutes and fades within about an hour, often in both eyes | Medical assessment if new, severe or atypical | Eye exam helps exclude retinal disease before considering migraine |
Warning signs that should not wait
- A sudden shower of many new black dots, strands or “pepper” spots
- Repeated flashes, especially in one eye or at the side of vision
- A curtain, veil, dark shadow or missing area in your field of view
- New blurred or distorted vision, or a sudden drop in visual acuity
- Floaters with red haze or smoke-like vision, which can indicate vitreous bleeding
- Symptoms after an eye injury, recent eye surgery or an injection
If any of these occur, do not drive yourself if vision is impaired. Contact an eye clinic or emergency department now and explain that you have sudden flashes or floaters and need a retinal assessment.
Who has a higher risk?
Retinal tears and detachments are more likely in people with high myopia, previous cataract or other eye surgery, a past retinal tear or detachment, significant eye trauma, a close family history, or conditions that can cause vitreous bleeding. Risk is individual, so a normal-looking symptom does not replace an examination.
How Nunehim Eye Center evaluates flashes and floaters
At an urgent visit, the doctor reviews when symptoms began, which eye is affected, changes in vision, medical history and risk factors. Testing may include:
- Visual acuity and pupil assessment to document how vision is functioning.
- Dilating drops and a peripheral retinal examination using an indirect ophthalmoscope; gentle scleral depression may be used to view the far peripheral retina.
- OCT or ocular ultrasound when media haze, vitreous blood or another issue limits the view.
A first examination can be reassuring, but a small number of tears appear after an early PVD. Your doctor may recommend a repeat examination, especially when symptoms continue, bleeding is present or risk factors are significant. Follow the exact follow-up interval you are given.
Treatment depends on what is found
- Uncomplicated PVD: observation and clear return precautions are common. Floaters may become less noticeable over time.
- Retinal tear: laser retinopexy or cryotherapy may seal the tear and reduce the chance of progression.
- Retinal detachment: urgent retinal repair may involve pneumatic retinopexy, a scleral buckle, vitrectomy or a combination, depending on the location and extent.
- Vitreous haemorrhage: the cause must be identified; additional imaging and retinal treatment may be needed.
These choices require an in-person examination. Do not use eye drops or wait for symptoms to disappear as a substitute for assessment.
Floaters and flashes: what to do in Seoul
If symptoms start while you are working near Gasan Digital Complex or Guro Digital Complex, stop and check whether one eye or both eyes are affected. Cover one eye at a time without pressing on the eye. Note the time symptoms began and whether a curtain, missing vision or sudden blur is present.
Nunehim Eye Center is at 551 Siheung-daero, Guro-gu, Seoul. We provide Korean and English consultations for patients from Guro, Gasan, Geumcheon, Doksan, Yeongdeungpo, Gwanak, Sillim, Sindaebang and Dongjak. Clinic hours are Monday–Friday 09:00–18:30 (lunch 13:00–14:00) and Saturday 09:00–14:00. For severe vision loss or a curtain-like shadow, seek the nearest emergency retinal service immediately.
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Frequently asked questions
Are floaters always dangerous?
No. Long-standing, stable floaters are often benign. A sudden change, especially with flashes or a field defect, needs a dilated retinal examination.
Can I wait until tomorrow if flashes stop?
It is safer to arrange prompt assessment. Flashes can reduce while vitreous traction or a retinal tear remains.
Are flashes from both eyes more likely to be migraine?
A shimmering pattern that builds over minutes and is visible with either eye may fit migraine aura, but a first or unusual episode still deserves medical advice. One-eye symptoms require particular caution.
Do I need an eye exam after a normal first visit?
Sometimes. Delayed retinal tears can occur after an early PVD, so follow-up is recommended when your doctor identifies risk factors or ongoing symptoms.
Can high myopia increase retinal detachment risk?
Yes, high myopia is one recognised risk factor. Ask your ophthalmologist how often your retina should be checked.
What should I bring to an urgent visit?
Bring your glasses or contact-lens details, medication list, prior eye-surgery information and the time symptoms began. If possible, arrange transport after dilation.
Key takeaway
New floaters plus flashes, a curtain-like shadow or reduced vision can be a retinal emergency — prompt dilation is the safest way to protect sight.
Medical sources
- National Eye Institute: Floaters and flashes
- American Academy of Ophthalmology: Torn or detached retina
- Systematic review: posterior vitreous detachment symptoms and retinal tear risk
- NSW Eye Emergency Manual: flashes and floaters
Reviewed for patient education by Daniel Jinhag Baik, MD, board-certified ophthalmologist and English-speaking eye doctor in Seoul. This article does not replace an in-person examination.
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