You searched for "Optics"

1899 results found

Glaucoma and capillary perfusion

Elevated IOP is important but not the sole factor responsible for retinal ganglion cell (RGC) death and optic nerve damage in glaucoma. There is increasing evidence that visual loss correlates with macular inner retinal thinning. A total of 148 eyes...

Retinal vessel diameter in pseudoexfoliation

Pseudoexfolation (PEX) is characterised by deposition of fibrillary extracellular material on ocular and extraocular tissue. Studies have shown that deposition in vascular structures cause hypoxia and ischaemia. In the eye, a decrease in blood supply to the optic nerve can...

Does methanol poisoning require ophthalmic investigation?

The authors report a case series of 21 patients (41 eyes) diagnosed with acute methanol poisoning following an outbreak in Tunisia in 2020. All patients underwent a complete ophthalmological examination including visual fields, colour vision test and optical coherence tomography...

The Retinal Atlas (2nd Edition)

Those readers familiar with the first edition of The Retinal Atlas will appreciate the comprehensive nature of this publication, and this latest version incorporates retinal images generated by recently developed imaging technology. As the title suggests, this hardcover version is...

Choroidal and RNFL thickness in patients with OSAS

In obstructive sleep apnoea syndrome (OSAS), hypoxia secondary to repetitive apnoeic episodes leads to blood pressure variations and haemodynamic changes. There is also intermittent activation of the sympathetic system when the patient is aroused from sleep during apnoeic episodes. OSAS...

OCT prognostic factors in AMD patients with peripapillary choroidal neovascularisation

In this retrospective study the authors aimed to investigate the correlation between optical coherence tomography (OCT) findings and visual acuity outcomes after treatment with intravitreal bevacizumab (IVB) injections for age-related macular degeneration (AMD) patients with peripapillary choroidal neovascularisation (PPCNV). Data...

Comparison of paediatric migraine and healthy controls using optical coherence tomography angiography

The authors present a cross-sectional study which recruited patients with paediatric migraine without aura along with age and sex-matched healthy controls. Both groups were recruited following attendance to an ophthalmology outpatient clinic. Children diagnosed with any of the following were...

The use of virtual reality in paediatric ophthalmology

The purpose of this study was to investigate the utility of virtual reality (VR) in the broader field of paediatric ophthalmology with review of examination, screening, diagnosis, prevention and treatment. This review also explores the potential of eye tracking used...

My top five: Trinkets of fact or fiction

Trinkets of adult wisdom are often delivered to children alongside warnings of catastrophic outcomes. In this article we present five ‘facts’ about eye health and vision and ask the question: to what extent are these ideas backed up by literature?...

My Top Five: Trinkets of fact or fiction

Trinkets of adult wisdom are often delivered to children alongside warnings of catastrophic outcomes. In this article we present five ‘facts’ about eye health and vision and ask the question: to what extent are these ideas backed up by literature?...

Virtual reality for the ophthalmic trainee

If you believe the tech blogs 2015 is the year of virtual reality. Industry experts believe this will be due to the potential commercial release of the poster boy of this new revolution, the Oculus Rift. This is a headset...

A brief history of colour vision

Andrew Want takes a look at how colour vision has evolved in humans and animals and how it differs across species. Colour vision is something that we often take for granted, but it has become so intrinsic to the way...