Symptoms & next steps · 1 minute
New flashes, floaters or a shadow?
Understand when a sudden vision change needs immediate attention.
Tell us about the change
Answer each question. Concerning answers show advice immediately. This cannot diagnose the cause.
Your privacy
These tools do not ask for your name or phone number. Answers stay in this page’s memory and are not sent to the clinic or saved by the tools. Refreshing clears them. Nothing is monitored by the clinic. A printed or saved summary remains your responsibility to keep private.
These self-checks cannot diagnose disease or replace an eye examination.
Sources and review status
Content version 1 · Clinical review confirmed 24 October 2026. Currently available in English.