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Angle Closure Glaucoma

Primary Angle Closure Glaucoma (PACG) affects about 0.4% of people in the UK over 40 [NICE].

What is Angle Closure Glaucoma?

Glaucoma is a condition, often associated with raised intraocular pressure, which can result in damage to the optic nerve affecting the field of vision. The level of intraocular pressure depends on the balance between the rate at which aqueous fluid is produced within the eye and the rate at which it leaves through the drainage angle of the eye. Angle closure glaucoma occurs when the eye’s drainage angle becomes blocked, causing the intraocular pressure to increase, sometimes suddenly and painfully.


Some people are born with narrow drainage angles and are predisposed to primary angle closure glaucoma (PACG).

Risk factors for acute angle closure glaucoma include: female, Asian, long-sighted, older age. There is usually a history of headaches, eye pain & blurred vision.

Secondary angle closure glaucoma can be caused by a big cataract (phacomorphic glaucoma) in a small (hypermetropic) eye. Other causes include trauma and intraocular surgery.


The symptoms of angle closure glaucoma depend on the cause and suddenness of the increase of intraocular pressure:

If the drainage angle of an eye closes then the drain becomes completely blocked, the intraocular pressure suddenly rises (acute angle closure) causing pain, halos, blurring of vision and nausea – this is an emergency and requires immediate treatment.

Most people with chronic primary angle closure have no symptoms.

Increasing pressure can damage the optic nerve initially affecting peripheral vision.

Driving may become more difficult, only noticing hazards when they are in the centre of the field of vision.

The lack of obvious symptoms highlights the importance of regular eye checks, by optician or ophthalmologist, to detect increased intraocular pressure, reduced field of vision and narrow drainage angles.


Elevated intraocular pressures can be controlled by:

Eye Drops

Either a single drop or a combination of drops


Only occasionally used for short term therapy


YAG Laser Iridotomy


Cataract surgery alone, Minimally Invasive Glaucoma Surgery (MIGS), Trabeculectomy, Filtration (Tube) Surgery

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Alistair QuinnAlistair Quinn
13:07 09 Apr 24
First class recommendation for My Eye Clinic and in particular Andrew Peel who was professional, knowledgeable very thorough. A pleasure to deal with!
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19:10 21 Feb 24
I recently had permanent lens procedure carried out by Mr Ghosh. Having glasses as a child and contact lenses for many years, this has been an absolute revelation for me. Mr Ghosh was absolutely brilliant and very professional from the start. All the staff are lovely and especially like to thank Dianne, Anita and the team. This has changed my life for the better thanks.
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09:35 29 Mar 23
Beautiful clinic, really nice atmosphere, prompt service and really friendly and professional staff. Fernando was particularly great!I would definitely recommend.
Mrs TigerMrs Tiger
17:51 17 Jan 23
Excellent care, all staff very courteous and helpful. YAG surgery clearly explained to me by Mr Morgan, who did a brilliant job. I'd highly recommend this clinic.
Arya DaniArya Dani
14:43 22 Dec 22
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Audrey GilesAudrey Giles
08:58 23 Nov 22
I visited the My Hearing Clinic knowing I needed a hearing assessment but thinking it was just a build up of wax. It came as a shock that I heard a hearing loss which needed addressing. The service I received from Andrew was outstanding! He explained my hearing loss and went through all my options. He recognised that it was a lot of information to take in so made a follow up appointment, giving me sufficient time to think about what I wanted to do. From start to finish the service has been excellent, efficient, professional and friendly from the moment you walk through the door and meet Lee. The clinic is well located, parking on site, high standard of cleanliness. Definitely a recommendation from me. Thank you!
Andrea BoothAndrea Booth
19:55 22 Nov 22
Absolutely first class treatment and experience at this wonderful clinic. Staff were exceptionally welcoming and friendly Mr Morgan the consultant was lovely explaining everything. I had YAG laser treatment painless no discomfort and almost immediate corrected vision. Thank you all so very very much.
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16:41 17 Nov 21
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