Complaint · Acute vision loss

Acute vision loss: documentation that holds up

Evidence-based · cited·Reviewed Jun 2026

Acute vision loss is an eye emergency with a stopwatch. The defensible chart records the visual acuity in both eyes, the intraocular pressure, and — when giant cell arteritis is possible — the inflammatory markers and the steroids started before the biopsy, because the next thing GCA takes is the other eye.

01What's at stake

Several causes are time-critical and bilateral-threatening: giant cell arteritis can blind the fellow eye within days if steroids are delayed; central retinal artery occlusion is a "stroke of the eye"; acute angle-closure glaucoma and retinal detachment lose vision by the hour. Visual acuity is the vital sign of the eye, and not documenting it — or not checking an ESR/CRP in the older patient — is the classic miss.

02Can't-miss differential

  • Giant cell arteritis (arteritic AION) — age >50, headache, jaw claudication, scalp tenderness, polymyalgia; elevated ESR/CRP. Treat empirically with steroids.
  • Central retinal artery occlusion — sudden painless monocular loss, afferent pupillary defect, cherry-red spot; hunt for the embolic source / consider stroke pathway.
  • Acute angle-closure glaucoma — painful red eye, halos, fixed mid-dilated pupil, IOP often >40.
  • Retinal detachment — flashes, floaters, a "curtain"; a field defect.
  • Central retinal vein occlusion, endophthalmitis, optic neuritis, and occipital stroke (homonymous field loss).

03History & exam

  • Painless vs painful, monocular vs binocular, transient vs persistent? → narrows the cause
  • Age >50 with headache, jaw claudication, scalp tenderness, PMR? → GCA
  • Flashes/floaters/curtain? → detachment
  • Eye pain, halos, nausea/vomiting? → angle-closure
  • Document visual acuity (both eyes), pupils/APD, IOP, fundus, and visual fields.

Skip the typing

Work the case in the Acute Vision Loss Workup — it records visual acuity and IOP, ESR/CRP, and the ophthalmology consult, and assembles an MDM that documents the sight-threatening causes were considered.

04Testing & management

  • GCA: ESR and CRP urgently; if suspected, start high-dose corticosteroids immediately — do not wait for temporal artery biopsy — to protect the fellow eye; urgent ophthalmology/rheumatology.
  • CRAO: time-critical; ocular massage and IOP-lowering measures may be attempted, treat as an acute ischemic event (many centers pursue a stroke workup/pathway); urgent ophthalmology.
  • Acute angle-closure: IOP-lowering drops and systemic agents (e.g., acetazolamide) and emergent ophthalmology for definitive iridotomy.
  • Detachment / endophthalmitis: emergent ophthalmology.
  • Binocular/field loss: consider stroke and image the brain.

05What to document

▼ weak
"Vision blurry in one eye. Refer to eye clinic."
▲ defensible
"72-year-old, sudden painless monocular vision loss; visual acuity R count-fingers, L 20/25; relative afferent pupillary defect right. Headache and jaw claudication present — GCA considered: ESR/CRP sent and high-dose steroids started empirically without waiting for biopsy. CRAO on fundus exam; treated as ocular ischemia with urgent ophthalmology and stroke evaluation. IOP normal (angle-closure excluded). Ophthalmology consulted at [time]."

06Where charts fail

  • No documented visual acuity (both eyes) or IOP.
  • Not checking ESR/CRP — or not starting steroids — in possible GCA, and losing the second eye.
  • Treating CRAO as routine rather than a time-critical ischemic event.
  • Missing acute angle-closure (high IOP, fixed mid-dilated pupil) in the painful red eye.
  • Not considering occipital stroke in binocular/field loss.

07Sources

  • Vortmann M, Schneider JI. Acute monocular visual loss. Emerg Med Clin North Am. 2008;26(1):73-96.
  • Hayreh SS. Acute retinal arterial occlusive disorders. Prog Retin Eye Res. 2011;30(5):359-394.
  • Smetana GW, Shmerling RH. Does this patient have temporal arteritis? JAMA. 2002;287(1):92-101.
  • American Academy of Ophthalmology. Preferred Practice Pattern: posterior vitreous detachment, retinal breaks, and lattice degeneration. Ophthalmology. 2020.

© 2026 Kim Trinh, MD. All rights reserved. Educational only — synthesized from primary literature and ophthalmology guidance. Synthetic examples. Not medical advice — apply local protocol and judgment.

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