You searched for "Optics"

1431 results found

Surgical options for the treatment of hyperopia

The modern refractive surgeon has a variety of options available to treat patients with hyperopia who wish to be independent of spectacles and contact lenses. Unlike in low myopia where presbyopic patients may have the ability to see well for...

Investigating the effect of signal strength on mean retinal nerve fibre layer

The aim of this study was to determine the effect of signal strength on mean retinal nerve fibre layer (RNFL) using spectralis optical coherence tomography (S-OCT). Thirty normal subjects were imaged with S-OCT using variably dense Bangerter foils to alter...

Visual outcomes, visual fields and optical coherence tomography in paediatric craniopharyngioma

This study reviews the visual outcomes of ten patients under the age of 18 years with craniopharyngioma. The paper also reviews the correlation between visual field (VF) testing and optical coherence tomography (OCT) examination and evaluates the role of OCT...

Reproducible OCT RNFL map in unilateral glaucoma

The aim of the study was to compare the reproducibility of the optical coherence tomography retinal nerve fibre layer (OCT RNFL) thickness map between glaucomatous and fellow normal eyes of unilateral glaucoma patients. The authors carried out a prospective case...

Katena Diamond Bi-aspheric indirect lenses

Carleton is pleased to report significant interest and positive feedback on the new extended portfolio of Katena Diamond Bi-aspheric indirect lenses.

Handbook of Retinal OCT

This is not a large colour atlas for optical coherence tomography (OCT) with comprehensive reference lists offering an in-depth description of this popular technology, but an up-to-date pocket or handbag-sized, soft-backed textbook that is likely to become a well-thumbed primer...

Optic disc pit maculopathy: an optical coherence tomography study

This was a single-centre, retrospective observational case series that aimed to analyse the change of optical coherence tomography (OCT) characteristics in the natural course of optic disc pit maculopathy (ODP-M) and their effects on visual acuity. Twenty-two eyes of 22...

Transient thickening of the macular retinal nerve fibre layer in acute optic neuritis

Acute optic neuritis (ON) causes axonal degeneration, which can be quantified from the blood by neurofilament protein (Nf) levels. Within about three months, atrophy of the retinal nerve fibre layer (RNFL) follows. However, it remains challenging to explain why there...

Animal antics for children with vision impairment

Nine families with children with vision impairment got up to some animal antics at a mini zoo in Perth, thanks to the charity RNIB.

Lessons from an unusual case of syphilis

The rise of syphilis transmission rates over the past two decades has been one of public health’s great puzzles. In the UK, the situation has reached epidemic levels, with a 126% increase between 2013 and 2018 [1]. We present a...

A simple technique for managing eyelid retraction in a patient with an exposed Boston type 2 keratoprosthesis (Kpro)

The article describes a patient with mucous membrane pemphigoid and a Boston type 2 Kpro. In the early postoperative period (one week) inferior skin retraction was noted with exposure of the Kpro and carrier cornea. The exposure was managed by...

Is it NAION… Now what?

Case presentation We present the case and discussion of a 46-year-old Caucasian male who complained of immediate reduced vision following complicated neck dissection including a total laryngopharyngectomy, free flap reconstruction for a T4N3 squamous cell carcinoma (SCC) of the left...