Disease Description (Causes and Symptoms)
Floaters are a symptom in which small objects such as dust, insects, or threads appear to float in front of the eyes. In most cases, they occur when shadows of opacities (floaters) caused by collagen aggregation or liquefaction of the vitreous humor are cast onto the retina. The main causes and related mechanisms are as follows.
- Age-related vitreous changes (vitreous liquefaction, posterior vitreous detachment): common after the age of 40
- High myopia, cataract surgery, trauma, inflammation (uveitis), vitreous hemorrhage (retinal vascular disease, diabetic retinopathy, etc.)
- Rare causes: retinal tear·retinal detachment, choroidal tumors, etc.
Main symptoms: moving spots, lines, cobwebs, or shimmering floaters; more noticeable against a bright background; sometimes flashing lights (photopsia). A sudden increase in floaters, new photopsia, or visual field defects (a curtain or obstruction) are warning signs of retinal tear or retinal detachment and require immediate evaluation.
Treatment Methods (Standard Treatment, Medications·Procedures·Surgery, Self-Management, Precautions)
- Conservative management (recommended in most cases)
- Many patients adapt to the symptoms over time, so observation and ophthalmic examinations (dilated fundus examination) are the basis of management.
- Reducing psychological stress and practicing not focusing on the floaters are recommended.
- Treatment of the underlying cause
- If there is an underlying condition such as hemorrhage or inflammation, treat that condition first (management of diabetes and hypertension, anti-inflammatory treatment, etc.).
- If pathological findings such as a retinal tear or neovascularization are present, treatment is performed with laser photocoagulation, vitrectomy, or other methods.
- Procedure/surgery options
- Laser vitreolysis (intraocular YAG laser, etc.): may be attempted to relieve symptoms in selected cases of some large floaters, but its effectiveness is limited and complications such as retinal damage are possible.
- Vitrectomy (pars plana vitrectomy, PPV): considered when symptoms are severe enough to interfere with daily life or when other treatments have failed. The goal is improvement in quality of life rather than improved vision. Major complications include cataract progression, retinal tear·retinal detachment, infection (endophthalmitis), hemorrhage, and changes in intraocular pressure.
- Precautions and risk of complications
- Sudden changes in symptoms (a sudden increase in floaters, new photopsia, or visual field defects) require emergency examination.
- Treatment, especially surgery, should be decided after carefully weighing the benefits against the risk of complications.
- Cataract progression is common after vitrectomy (especially in middle-aged and older adults).
Outpatient Visit Checkpoints (Items to Prepare and Things to Check Before the Visit, Including Example Questions)
Items to prepare/bring:
- A list of medications currently being taken (including eye drops)
- Past medical history (diabetes, hypertension, retinal disease, eye surgery, ocular trauma) and family history (such as retinal detachment)
- A record of the date symptoms began and their course (when they started, suddenly/gradually, aggravating factors, one eye/both eyes)
- Photos or records of the symptoms (while looking at a bright background with a smartphone, make a note or drawing of the shapes perceived)
- Recent examination results, such as fundus examination, OCT, and intraocular pressure records (if available) Things to check before the visit:
- When the symptoms occurred, their frequency, and changes (e.g., suddenly appearing a few days ago/gradually increasing)
- Associated symptoms: decreased vision, eye pain, flashing lights, or partial obstruction of the visual field
- Whether there has been recent trauma, surgery, or injections (related to the eye)
- The impact on vision (the degree of discomfort in daily life) and areas of life (driving, work, etc.)
General Example Questions to Ask the Doctor
- What is the likely cause of the floaters in my case? Do I need any additional tests?
- Are there any emergency measures I need to take right now for my current symptoms?
- What are the advantages and disadvantages and expected complications of treatments such as laser treatment or vitrectomy?
- If we observe the progression, how often should I have examinations?
- To what extent could these symptoms have a permanent effect on my vision?
Examples of Condition-Specific Questions
- My floaters have suddenly increased significantly recently, and I am seeing flashes. Am I at high risk of a retinal tear or retinal detachment? Should I have a dilated fundus examination immediately?
- If vitrectomy or vitreolysis is recommended, considering my age, degree of myopia, and the location of the symptoms, what degree of improvement can be expected and what is the complication rate?
(If necessary, detailed evaluation with fundus photography, a dilated eye examination, OCT, etc. is recommended. If an emergency is suspected, visit an ophthalmologist immediately.)