Sudden Vision Loss — Ophthalmic Emergency Paris

A sudden vision loss — whether total, partial, central or peripheral — is a major ophthalmic emergency. Whatever the cause, every minute without treatment may translate into permanent visual sequelae.

What is sudden vision loss?

We speak of sudden vision loss when visual acuity drops abruptly, within seconds, minutes or hours, without direct trauma to the eye. It may affect:

• Central vision (difficulty reading, recognising faces)
• Peripheral vision (visual field narrowed on one side)
• An entire sector of the visual field (quadrant or half-field)
• The entire vision of one eye (transient or permanent monocular blindness)

What are the causes of sudden vision loss?

The main causes requiring emergency management are:

• Retinal detachment: sudden loss often preceded by floaters and a dark curtain
• Retinal artery occlusion: vascular emergency equivalent to an ocular stroke — see Dr Gozlan within the hour
• Retinal vein occlusion: painless vision loss, often partial
• Vitreous haemorrhage: blood in the vitreous cavity blocking light
• Wet AMD: progressive but rapid central vision loss
• Acute angle-closure glaucoma: associated with severe eye pain and a red eye

Why call immediately?

Some of these conditions are true vascular emergencies (retinal artery occlusion) where the therapeutic window is 4-6 hours, after which the loss becomes irreversible. Others, like retinal detachment, require surgery ideally within the same day to preserve central vision. Do not wait — contact Dr Gozlan via chat for immediate triage.