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2535 results found

Optical quality difference between monofocal and multifocal intraocular lenses

It is well known that multifocal intraocular lenses (IOLs) can generate more than one focus to restore distance and near vision, but patients may experience adverse optical phenomena such as decreased contrast sensitivity and induced glare or halos. The authors...

Success rates of primary and revision transcanalicular DCR surgery

Transcanalicular laser DCR is a relatively rare procedure compared to more conventional external or endo-nasal techniques. In this article the authors examine the outcomes of revision surgery following failed transcanalicular diode laser dacryocystorhinostomy (TCDL DCR), comparing a conventional external revision...

Open-field autorefraction screening

This study aimed to determine the efficacy of the Shin-Nippon NVision-K5001 autorefractometer using the open-field refractometry principle in the elimination of accommodation in children. One hundred and fourteen patients aged three to six years were recruited. After excluding ocular pathology...

Macular pigment and dark adaptation in older population with normal maculas

Macular pigment (MP) such as lutein, zeaxanthin and meso-zeaxanthin are highly concentrated in the fovea. They protect the retina from damage of ambient blue light via antioxidant properties. In older eyes with normal healthy retina, macular pigment optical density (MPOD)...

Differences in elastometry of cornea and optic nerve head in both eyes of patients with NAION

Non-arteritic anterior ischaemic optic neuropathy (NAION) is an important cause of visual loss in the middle aged and elderly population. This prospective cross-sectional study investigates the biomechanical properties of optic nerve head (ONH) and cornea in both eyes of patients...

Immediate postop alignment differences between adult and childhood ET

The purpose of this study was to investigate the immediate postoperative alignment among patients undergoing successful surgery for esotropia and to determine whether there are any differences between children and adults. This was a retrospective case review of 544 cases;...

Amblyopia risk factors in premature children

The purpose of this study was to determine the incidence and timing of presentation of amblyopia risk factors in premature children during the first three years of life. This was a retrospective study including 145 of 292 premature children. Retinopathy...

Association between diabetes mellitus and dry eye disease

Diabetes mellitus (DM) is currently one of the most prevalent chronic diseases in the United States. It is estimated that 12.3% of Americans suffer from DM. In this study the authors compare between dry eye and diabetes mellitus among a...

Lang Stereopad comparisons

The aim of this study was to compare the effectiveness of the Lang Stereopad in detecting and measuring stereopsis in a population with normal visual parameters. The Lang Stereopad was compared directly to the Frisby, TNO and Lang II stereotests...

Using contrast acuity and rapid number naming in Huntington’s disease

This study aimed to evaluate afferent and efferent visual function in Huntington’s disease (HD). HD is often portrayed by abnormal saccadic eye movements and afferent visual pathway involvement however these are poorly characterised and difficult to quantify at the bedside....

The effect of caffeine on pupil size and accommodation

Twenty-two young and healthy participants were recruited in this study. The authors showed that pupil size increased as a result of caffeine consumption. A more stable (lower variability of accommodation) accommodative response (AR) was induced by caffeine intake, whereas the...

BEST stereotest

BEST (Bernell Evaluation of Stereopsis Test) is a filter-free method that uses lenticular technology. The test presents colourful animal targets ranging from 400 to 40”. Stereoacuity was measured with BEST and Randot in 100 children aged 3.3-17.8 years, mean 8.52...