[Durgical](https://durgical.com/en/) › [DurgiPedia](https://durgical.com/en/durgipedia/) › [Ophthalmology](https://durgical.com/en/ophthalmology/) › [Approach by symptom](https://durgical.com/en/ophthalmology/areas/approach/) › Sudden painless visual loss

# Sudden painless visual loss

- Clinical approach

Vision lost in minutes or hours without pain is an emergency: the retina, optic nerve or brain is short of blood, or the retina has detached.

Updated Nov 5, 2026

**See it in 3D:** [Retina](https://durgical.com/en/anatomy/retina/) · [Central retinal artery](https://durgical.com/en/anatomy/central-retinal-artery/) · [Optic disc](https://durgical.com/en/anatomy/optic-disc/) · [Optic nerve](https://durgical.com/en/anatomy/optic-nerve/) · [Visual cortex](https://durgical.com/en/anatomy/cuneus/)

## Key points

- Sudden painless monocular loss: CRAO, CRVO, retinal detachment, vitreous haemorrhage, ischaemic optic neuropathy.
- Cherry-red spot = central retinal artery occlusion = stroke workup.
- Over 50: think giant cell arteritis, order ESR and CRP and treat the same day.
- Homonymous field loss with normal eyes = lesion behind the chiasm.

## What it is

Sudden painless loss of vision in one eye usually comes from an artery or vein occlusion of the retina, a retinal detachment, a vitreous haemorrhage or an ischaemic optic neuropathy. Loss in both eyes, or of half the field, points to the visual pathway behind the eye, often a stroke. In anyone over 50, giant cell arteritis must be considered at the first visit because the other eye can be lost within days.

## Red flags

- Age over 50 with headache, jaw pain on chewing, scalp tenderness, fever or shoulder and hip stiffness: giant cell arteritis.
- Onset within the last hours: central retinal artery occlusion can be a treatable stroke.
- A curtain or shadow spreading across the vision after floaters and flashes: retinal detachment.
- A relative afferent pupillary defect: extensive retinal or optic nerve damage.
- Loss of the same half of the field in both eyes, or other neurological signs: stroke.

## Step-by-step approach

- Confirm whether one eye or both are affected by covering each eye: a homonymous field loss is often reported as loss in one eye.
- Record the time of onset, whether it was transient or persistent, and the vascular risk factors.
- Measure visual acuity and check for a relative afferent pupillary defect.
- Look at the red reflex: an absent reflex suggests vitreous haemorrhage.
- Examine the fundus: pale retina with a cherry-red spot, scattered haemorrhages, a detached retina or a swollen disc.
- Test the fields by confrontation and do a brief neurological exam.
- In patients over 50, ask the symptoms of giant cell arteritis and order ESR and CRP at the same visit.

## Main causes of sudden painless visual loss

| Cause | Clue | Fundus | Urgency |
| --- | --- | --- | --- |
| [Central retinal artery occlusion](https://durgical.com/en/conditions/central-retinal-artery-occlusion/) | Abrupt, profound; vascular risk factors | Pale retina, cherry-red spot | Emergency (stroke pathway) |
| [Central retinal vein occlusion](https://durgical.com/en/conditions/central-retinal-vein-occlusion/) | Blurred or reduced vision on waking; hypertension, glaucoma | Haemorrhages in all quadrants, swollen veins and disc | Same day |
| [Retinal detachment](https://durgical.com/en/conditions/retinal-detachment/) | Floaters, flashes, then a curtain | Grey elevated retina | Same day; emergency if the macula is still attached |
| Vitreous haemorrhage | Shower of dark floaters; diabetes | Poor view, dull red reflex | Same day |
| [Arteritic ischaemic optic neuropathy](https://durgical.com/en/conditions/giant-cell-arteritis/) | Over 50, headache, jaw claudication | Pale swollen disc | Emergency (steroids now) |
| [Occipital stroke](https://durgical.com/en/conditions/ischaemic-stroke/) | Same half of the field lost in both eyes | Normal | Emergency (stroke code) |
| [Neovascular macular degeneration](https://durgical.com/en/conditions/age-related-macular-degeneration/) | Central blur and distortion, over 50 | Haemorrhage or fluid at the macula | Urgent (days) |

## Keys to the differential

- Painless sudden visual loss with a cherry-red spot is an eye stroke: it carries the same risk of brain stroke as a transient ischaemic attack.
- Normal eyes and pupils with a homonymous field defect place the lesion behind the chiasm.
- A dull red reflex in a person with diabetes suggests vitreous haemorrhage from proliferative retinopathy.
- Altitudinal loss (the upper or lower half) with a swollen disc is ischaemic optic neuropathy; with a raised ESR it is arteritic until proven otherwise.

## Next step / Initial management

- Every case of sudden visual loss: same-day assessment by ophthalmology; within hours if onset was recent.
- Central retinal artery occlusion or homonymous loss within hours: send to the emergency stroke pathway (brain and vessel imaging, ECG, stroke unit).
- Suspected giant cell arteritis: ESR and CRP, start high-dose corticosteroids the same day without waiting for the biopsy, refer to ophthalmology and rheumatology.
- Retinal detachment with the macula still attached: emergency surgery; advise rest and no strenuous activity while transfer is arranged.
- Central retinal vein occlusion: control blood pressure, check glucose, lipids and eye pressure; ophthalmology follow-up for macular oedema and new vessels.

## Test yourself

Think of the answer, then tap the question to see it.

## Which tests should be ordered at the first visit for sudden visual loss in a 75-year-old with headache?

ESR and CRP for giant cell arteritis, with corticosteroids started the same day if it is suspected, without waiting for the biopsy.

## What does a cherry-red spot at the macula with a pale retina indicate?

A central retinal artery occlusion: an eye stroke that needs urgent stroke evaluation.

## How is a homonymous field defect told apart from a problem in one eye?

By covering each eye in turn: the same half of the field is missing in both eyes, and the eyes and pupils are normal.

[Add to my cards (3)](https://durgical.app/estudiar/?add=/en/ophthalmology/sudden-painless-visual-loss/)

## Elsewhere in DurgiPedia

- [Fundoscopy: the optic disc, papilledema and retinopathy](https://durgical.com/en/clinical-exam/fundoscopy-the-optic-disc-papilledema-and-retinopathy/)
- [Pupils: light reflex and abnormal pupils (Marcus Gunn, Horner, Argyll Robertson)](https://durgical.com/en/clinical-exam/pupils-light-reflex-and-abnormal-pupils/)

## Connections

## See it in 3D 5

The structures of Durgical's 3D anatomy where it is found.

- [Retina](https://durgical.com/en/anatomy/retina/)
- [Central retinal artery](https://durgical.com/en/anatomy/central-retinal-artery/)
- [Optic disc](https://durgical.com/en/anatomy/optic-disc/)
- [Optic nerve](https://durgical.com/en/anatomy/optic-nerve/)
- [Visual cortex](https://durgical.com/en/anatomy/cuneus/)

## Related 7

- [Transient visual loss (amaurosis fugax)](https://durgical.com/en/ophthalmology/transient-visual-loss/)
- [Central retinal artery occlusion: an eye stroke](https://durgical.com/en/ophthalmology/central-retinal-artery-occlusion-an-eye-stroke/)
- [Central retinal vein occlusion: workup and follow-up](https://durgical.com/en/ophthalmology/central-retinal-vein-occlusion-workup-and-follow-up/)
- [Retinal detachment: how fast to refer](https://durgical.com/en/ophthalmology/retinal-detachment-how-fast-to-refer/)
- [Giant cell arteritis and the eye: treat before the biopsy](https://durgical.com/en/ophthalmology/giant-cell-arteritis-and-the-eye-treat-before-the-biopsy/)
- [Localising a visual field defect](https://durgical.com/en/ophthalmology/localising-a-visual-field-defect/)
- [Eye pain and painful visual loss](https://durgical.com/en/ophthalmology/eye-pain-and-painful-visual-loss/)

## Related conditions 7

- [Central retinal artery occlusion](https://durgical.com/en/conditions/central-retinal-artery-occlusion/)
- [Central retinal vein occlusion](https://durgical.com/en/conditions/central-retinal-vein-occlusion/)
- [Retinal detachment](https://durgical.com/en/conditions/retinal-detachment/)
- [Giant cell arteritis](https://durgical.com/en/conditions/giant-cell-arteritis/)
- [Ischaemic stroke](https://durgical.com/en/conditions/ischaemic-stroke/)
- [Age-related macular degeneration](https://durgical.com/en/conditions/age-related-macular-degeneration/)
- [Diabetic retinopathy](https://durgical.com/en/conditions/diabetic-retinopathy/)

[← All of ophthalmology](https://durgical.com/en/ophthalmology/)

Educational content; not a clinical guideline and no substitute for assessment by a health professional. For sudden visual loss, severe eye pain, a chemical burn or an eye injury, go to an emergency department at once.

Sources: [Central Retinal Artery Occlusion](https://www.ncbi.nlm.nih.gov/books/NBK470354/) (StatPearls Publishing (NCBI Bookshelf), 2024); [Central Retinal Vein Occlusion](https://www.ncbi.nlm.nih.gov/books/NBK525985/) (StatPearls Publishing (NCBI Bookshelf), 2023); [Giant Cell Arteritis (Temporal Arteritis)](https://www.ncbi.nlm.nih.gov/books/NBK459376/) (StatPearls Publishing (NCBI Bookshelf), 2024); [Retinal Detachment](https://www.ncbi.nlm.nih.gov/books/NBK551502/) (StatPearls Publishing (NCBI Bookshelf), 2024).

## **Spotted a mistake?** We are always improving for the community. Tell us what is wrong and our team will review it. Report a mistake

Representative model, for educational purposes only.

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Source: https://durgical.com/en/ophthalmology/sudden-painless-visual-loss/
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/ophthalmology/sudden-painless-visual-loss/