The angle formed between the cornea and the iris gradually decreases with age as the crystalline lens thickens. This trend is more marked in people with brown eyes. The condition will generally be identified in a presbyopic applicant undergoing routine optometrist examination for the purpose of near vision prescription.
The existence of a narrow angle puts the applicant at risk of chronic glaucoma or acute angle closure, an incapacitating condition. Prophylactic office surgery by laser iridotomy or iridoplasty is generally effective. Cataract extraction is curative because the thin lens implant no longer puts pressure on the anterior chamber angle.
Applicants who first present with a history of narrow angle or narrow angle glaucoma or whom the ME suspects may have a narrow angle, should provide:
Applicants who subsequently present with a history of history of narrow angle of the anterior chamber or narrow angle glaucoma should provide:
An applicant with narrow angle may be considered as not having a condition that is of aeromedical significance only if:
An applicant with narrow angle glaucoma that is treated, stable and has only a small unilateral visual field deficit, not overlapping the contralateral blind spot, may be considered as having a condition that is not of aeromedical significance if:
In case of doubt the ME should seek advice from the CAA.