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Glaucoma, Acute and Closed Angle

Eye Conditions

Description

Referral


H40.0-6/H40.8-9

DESCRIPTION

Acute closed angle glaucoma is damage to the optic nerve caused by raised intra-ocular pressure. This may result in loss of vision usually in one eye.

Clinical features:

  • Pupil is moderately dilated and may be oval in shape.
  • Corneal haziness.
  • Pericorneal conjunctival inflammation.
  • Sudden onset of extremely severe, bursting pain and eye redness.
  • A unilateral, temporal headache, after being exposed to a period of darkness, e.g. in a cinema.
  • Coloured haloes around lights (bright rings).
  • Eye feels hard, compared to the other eye, when measured with finger palpation (this is not an accurate test).
  • Severe pain in eye (acute).
  • Nausea and vomiting in severe cases.

Note:

 The more common chronic open angle glaucoma is usually without symptoms.


Emergency medicine treatment before referral (Doctor prescribed)

  • Acetazolamide, oral, 500 mg, immediately, followed by 250 mg, 6 hourly until referred.

REFERRAL

Urgent

  • All patients to an ophthalmologist within 12 hours.

Click here to access the pdf.


Standard Treatment Guidelines and Essential Medicines List for South Africa, Primary Healthcare, 2020-2024_Version 1.0_30 September 2024

Chapter 18: Eye Conditions_18.4 Glaucoma, Acute and Closed Angle

Drugs mentioned

ICD-10 codes

NeoHealth® ID 20147 · updated 6/24/2025