You searched for "Optics"

1863 results found

Cybersight: Using OCT as an Approach to Diagnose Glaucomatous and Other Optic Neuropathies

Clinically, the difference between glaucomatous and simple optic atrophy of other origins is not always clear. OCT with the ability to image and measure inner retinal layers in the macula and peripapillary area, with the measurement of rim atrophy, is...

Conservative management of concomitant strabismus

The aim of management for all patients with strabismus should centre around four goals: to prevent amblyopia, to alleviate symptoms, to restore binocular single vision (BSV) and to improve ocular alignment. The conservative management options available for strabismus include observation,...

Use of RAPDx device with optic nerve disease

The authors have previously reported on use of the RAPDx device for evaluating relative afferent pupillary defects (RAPD). RAPDx objectively determines the magnitude of RAPD by presenting light stimuli alternately to pairs of eyes with laterality. The parameters of amplitude...

Optic nerve head perfusion response to reduced blood pressure and increased intraocular pressure

The purpose of this prospective study was to test the hypothesis that blood flow autoregulation in the optic nerve head has less reserve to maintain normal blood flow where there is a blood pressure induced decrease in ocular perfusion pressure...

An interesting presentation of ruptured anterior communicating artery aneurysm with acute monocular vision loss

The authors report an interesting case of a 60-year-old man presenting with acute monocular vision loss accompanied by periorbital pain as an unusual presentation of subarachnoid haemorrhage (SAH) from ruptured anterior communicating artery aneurysm. The patient did not present with...

Prevalence of strabismus in neurofibromatosis type 1

The purpose of this study was to evaluate the prevalence of strabismus in NF1 by comparing children with normal neuroimaging to those with optic pathway glioma. The study included 236 children with NF1, of which 38 were excluded with no...

A novel presentation of optic disc oedema with syphilis

Optic disc oedema (ODE) due to syphilis without visual compromise has been primarily attributed to papilloedema from raised intracranial pressure or optic perineuritis from optic nerve sheath inflammation. These terms were proposed before magnetic resonance imaging (MRI) was largely available....

Transient visual loss caused by crowded optic discs

The author presents four cases of transient visual loss (TVL) in young females (age range at presentation 14-22 years) with crowded optic discs. Patient demographics, investigations, medical and social histories are provided for all patients. A review of evidence for...

New prognostic model for multiple sclerosis after optic neuritis presentation

The authors present a post-hoc analysis using the publicly available data set from the Optic Neuritis Treatment Trial. The Cox proportional hazards regression models were used to assess for associations between clinical and radiological variables and the development of clinical...

Optic canal measurements in children

The authors aimed to determine the normal range of optic canal diameters in a Turkish pediatric population. They evaluated 200 CT examinations: 102 females, 98 males with mean age of 86.42 ±65.39 months (range 1-211). There was no significant difference...

OCTA optic disc measurement differences between glaucoma and pituitary macroadenoma

This prospective case-control study aimed to assess the potential of optical coherence tomography (OCT) and OCT angiography (OCTA) in distinguishing between glaucoma and pituitary macroadenoma based on optic disc appearance. Thirty-one patients (23 with glaucoma, eight with pituitary macroadenoma) were...

Newer generation IOL platforms designed for high-quality visual performance after cataract surgery

Expanding intraocular lens (IOL) capabilities provide broadening options, ranging from next-generation monofocal IOLs for basic cataract surgery, to specialised premium IOLs for lens-based presbyopia correction and astigmatism correction at the time of cataract surgery. Rod McNeil considers several newer alternative...