Cobwebs or spider‑web patterns in vision usually represent vitreous floaters or condensed strands. They move with eye movements and drift when looking around.
Underlying Changes
Liquefaction and collapse of the vitreous gel with age cause fibres to clump and cast shadows on the retina. Posterior vitreous detachment is a frequent cause and may occasionally pull on the retina, creating tears.
- High myopes and older adults are particularly prone
- Inflammation, haemorrhage, or surgery can increase vitreous opacities
- Patients often report a new web or veil across vision
- Risk of retinal tear is highest around the time of acute vitreous detachment
Clinical Advice
New cobweb‑like floaters should prompt a dilated eye examination. Ongoing monitoring is needed if vitreoretinal traction or lattice degeneration is present.
- Emergency attention is required if accompanied by flashes or a curtain effect
- Most floaters become less noticeable over time as the brain adapts
- Vitrectomy for floaters is considered only in carefully selected cases
- Patients should avoid ignoring sudden changes, even if previous floaters seemed harmless
