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Do Vitreous Floaters Predict Retinal Detachment? Retrospective Cohort Study in Primary Care.

Bart van Zon1, Marcia Spoelder1, Hans J Peters1

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|March 24, 2026
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Summary

New-onset floaters significantly increase the risk of retinal detachment (RD). Family physicians should consider floaters a key alarm symptom for RD, as they pose a greater risk than flashes alone.

Keywords:
family practiceophthalmologyprimary health careretinal detachmentvitreous bodyvitreous floaters

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Area of Science:

  • Ophthalmology
  • Primary Care Medicine
  • Retinal Diseases

Background:

  • Vitreous floaters are often dismissed as benign but can signal serious retinal conditions.
  • New-onset floaters are a potential early warning sign for retinal tears or detachment (RD).
  • While ophthalmology data links floaters to retinal tears, primary care associations remain understudied.

Purpose of the Study:

  • To determine the absolute risk (AR) and relative risk (RR) of retinal detachment (RD) associated with new-onset floaters in a primary care setting.
  • To compare the RD risk posed by floaters versus flashes in primary care.

Main Methods:

  • Retrospective cohort study of 1,181 patients aged 18+ with new-onset floaters or flashes across 7 Dutch family practices (2012-2021).
  • Electronic health records were reviewed to categorize cases into floaters, flashes, or both.
  • Subgroup analyses considered floaters' duration (acute ≤14 days) and quantity (many ≥10 or visual obstruction). Relative risk (RR) was calculated with flashes alone as the reference.

Main Results:

  • The incidence of floaters was 5.5 and flashes 2.7 per 1,000 patient-years.
  • Absolute risk (AR) of RD was 6.1% for floaters alone, 4.7% for flashes alone, and 8.4% for both.
  • Both acute and numerous floaters elevated AR. RRs were significantly increased for acute floaters (2.39), many floaters (4.20), and both (6.20) compared to flashes alone.

Conclusions:

  • Primary care data confirms that new-onset floaters are an important risk factor for retinal detachment (RD).
  • Floaters present a greater RD risk in primary care than flashes, challenging current clinical practice.
  • Findings support family physicians in evidence-based risk assessment for patients presenting with floaters or flashes.