GuidelinesPrimary Care STG
Glaucoma, Acute and Closed Angle
Eye Conditions
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.
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