There are rarely any symptoms in the early stages of the disease so regular eye checks by qualified professionals are important.
Ophthalmologists and optometrists will diagnose glaucoma on the basis of intraocular pressure, visual field tests and optic nerve head appearance.
Patients will sometimes notice patchy loss of peripheral vision or reduced clarity of colours and these people may benefit from a review by an eye specialist.
Symptoms of angle closure glaucoma can include pain in or around the eye ball, headache, nausea/vomiting and visual disturbances, for example halos around lights. In some cases there are no symptoms.
Further Reading
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