The commonest cause of an optic neuropathy in Singapore is ischaemia, and ischaemic optic neuropathy (ION) is one of the commonest causes of permanent loss of vision in elderly patients, especially in those with diabetes mellitus, hypertension and hyperlipidaemia. ION in our practice is almost invariably of the anterior variety and non-arteritic in origin, i.e. NA-AION. Posterior ION comprises ...

The two or three posterior ciliary arteries (medial and lateral posterior ciliary arteries), which are the source of blood supply to the posterior choroid, are also the major souice of blood supply to the optic nerve head (Hayreh, i969, I970) and have a segmental distribution (Hayreh, I970, I97ib). The ciliary circulation is the only source of blood supply to the lamina cribrosa and prelaminar ...

The causes of nonglaucomatous optic disk atrophy and excavation are enumerated in people 65 years or older: congenital anomalies, myopia, ischemic disorders, transsynaptic degeneration, traumatic, compressive, hereditary, toxic and infectious optic neuropathy.

Giant cell arteritis is a systemic granulomatous vasculitis affecting medium to large arteries. An arteritic anterior ischemic optic neuropathy is the most common cause of permanent visual loss. Giant cell arteritis is very rare among Asians. We report six patients with biopsy-proven arteritic anterior ischemic optic neuropathy. Demographic data, clinical manifestations, laboratory findings, tr...

Ophthalmologic complications with interferon therapy are rare and usually reversible. The anterior ischemic optic neuropathy is an uncommon complication of interferon treatment. A case of irreversible anterior ischemic optic neuropathy complicating interferon therapy for chronic hepatitis C is reported. We suggest that periodic ophthalmological examinations, including visual acuity and fundus e...

The review presents data from studies of the ophthalmological consequences disease caused by SARS-CoV-2, especially regarding its rare manifestations. Clinical manifestations post-COVID-19 syndrome disappear within about two weeks in mild cases and 3 to 12 more severe cases. 80 % patients have than one, often two, 10 symptoms. In general, improve spontaneously continuously over time. ophthalmic...

PURPOSE To evaluate the optic disc area of patients with non-arteritic anterior ischemic optic neuropathy (NA-AION) and arteritic anterior ischemic optic neuropathy (A-AION) and compare the results between each other and with those from controls in order to verify the existence and the magnitude of anatomical factors predisposing to the development of anterior ischemic optic neuropathy. METHO...