You searched for "Optics"

1463 results found

Choroidal vascularity in NAION

The authors present a cross-sectional, non-interventional study of healthy volunteers and those with non-arteritic anterior ischaemic optic neuropathy (NAION) recruited over a six-month period at a single site. NAION is the most common cause of acute optic neuropathy over the...

Progression in the Early Manifest Glaucoma Trial

The Early Manifest Glaucoma Trial (EMGT) had previously demonstrated without doubt that intraocular pressure reduction decreased the risk of progression in patients with early glaucoma. In this analysis of 306 eyes over eight years from the EMGT, perimetric and optic...

A diagnostic imaging technique for optic pathway tumours

The authors discuss the difficult clinical scenario of patients with deteriorating visual function and an optic pathway lesion. The morbidity associated with biopsy means a highly sensitive and specific imaging technique would be of great value. The authors describe the...

Gender and ethnicity related differences in optic nerve head

The authors investigated the effect of ethnicity and gender on optic nerve head morphology comparing Indian and Caucasian males and females. The optic nerve head was investigated using spectral-domain optic coherence tomography (SD-OCT). Results showed that disc and rim areas...

Is optic disc drusen a risk factor in young patients with anterior ischaemic optic neuropathy?

This retrospective cross-section multicentre study reviewed 65 patients all younger than 50-years-old with non-arteritic anterior optic neuropathy (NA-AION) between April 2017 and March 2019. The purpose of this study was to investigate if there was a link between Optic Disc...

Long-term follow-up of OPGs in neurofibromatosis type 1

This retrospective observational case series reports outcomes of children followed-up for at least 10 years with optic pathway glioma (OPGs) related to neurofibromatosis type 1 (NF1) between January 1985 and July 2007. They observed 45 children for a mean of...

Melanocytoma of the optic disc

Melanocytoma is a heavily pigmented lesion, composed of melanocytes and is a variant of melanocytic naevus. It classically occurs at the optic disc and is usually benign, static and asymptomatic. However, it can occasionally grow and invade the retina or...

Repeated orbital decompression surgery

This is a retrospective review of nine redo orbital decompressions in six patients. All operations were performed for dysthyroid optic neuropathy, both initially and when repeated. The interval between first and redo decompressions varied from one to 15 years and...

Positive diagnosis of acute posterior ischaemic optic nerve neuropathy

Posterior ischaemic optic neuropathy is a rare cause of visual loss believed to be due to infarction in the territory of the pial branches of the ophthalmic artery. There is an absence of clinical signs which means the diagnosis is...

Nonarteritic anterior ischaemic optic neuropathy

This review article describes nonarteritic anterior ischaemic optic neuropathy (NAION). This condition is one of the common causes of visual loss in adults. The article uses a good range of references and is divided under the headings of; demographics, clinical...

Macular slippage following macular hole surgery

The treatment of macular holes now involves peeling the internal limiting membrane (ILM) as well as vitrectomy and gas tamponade. It has been noted in previous studies that following an ILM peel the morphology of the macula is different. Tadayoni...

Do occult neuroretinitis and non-arteritic anterior ischaemic optic neuropathy differ in presentation?

This study evaluates differences between neuroretinitis and non-arteritic anterior ischaemic optic neuropathy (NAAION) in terms of patient demographics, clinical presentation, and optical coherence tomography (OCT) findings. Medical records of patients with a final diagnosis of occult neuroretinitis or NAAION were...