Sudden vision loss — every minute counts
Sudden painless loss of vision in one eye is one of the true ophthalmic emergencies. The treatment window for some causes (retinal artery occlusion) is measured in hours — not days.
What can cause this — and how each feels different.
Central retinal artery occlusion
Sudden painless blackout in one eye — an eye 'stroke'. Treatment must begin within hours to preserve any vision.
Retinal detachment
Sudden vision loss preceded by flashes, floaters or a curtain moving across the vision. Surgical emergency.
Vitreous haemorrhage
Sudden dense floaters and vision loss, often in a diabetic patient.
Optic neuritis
Sudden vision loss with pain on eye movement, often in a young adult — needs neurological workup.
Wet AMD or subretinal bleed
Sudden central vision loss in older adults, often with distortion. Anti-VEGF injections started early preserve most vision.
When to seek care — a practical guide.
Use the guide below only as a starting point. If you are unsure, run the free AI Symptom Checker or simply message us on WhatsApp — we would rather see you and reassure you than miss something serious.
Questions patients ask us most.
Should I wait to see if it improves?
No. Sudden vision loss should be treated as an emergency — some causes have treatment windows of hours.
Can vision come back?
Sometimes — if the cause is treated promptly. Retinal detachment surgery in the first 24-48 hours has excellent outcomes; retinal artery occlusion has a narrow window measured in hours.
The AI Eye Symptom Checker is an educational triage aid only. It cannot examine your eye and it cannot make a diagnosis. It is not a substitute for a physical, in-person consultation with an ophthalmologist. If you have any doubt, please book an appointment or come to the clinic.Concept by Dr. Shantanu Kumar Gupta & Dr. Manisha Mishra · Developed with AI
This article is for patient education. It is not a substitute for personalised medical advice, examination or diagnosis. If you have symptoms discussed here, please book an in-person consultation with a qualified ophthalmologist.