You searched for "Optics"

1866 results found

Link between compression of anterior visual pathway structures and visual deficit

The compression of anterior visual pathway (AVP) structures can be observed on neuroimaging. It is not clear whether or not this compression results in damage to these structures. The authors present a single centre retrospective case record review over the...

Management of large hypertropia due to lost inferior rectus

This case report outlines the management strategy for a 37-year-old male who suffered a penetrating left orbital injury with rupture of the inferior rectus muscle, optic nerve avulsion and vertical deviation of about 90PD. On orbit exploration, the inferior rectus...

Orbital cellulitis outcomes for children

This paper discusses the clinical profile and multidisciplinary team (MDT) management outcomes in children treated for paediatric orbital cellulitis. This was a prospective study of 40 children with a mean age of 7.5 years (4-12). Unilateral orbital cellulitis cases had...

Clinical features of ocular syphilis

The study looked at 24 patients (20 males, four females) with serological evidence of syphilitic infection who presented to a tertiary ophthalmic centre. Ocular involvement was the first manifestation of syphilitic disease in 96% and Human Immunodeficiency Virus (HIV) seropositivity...

Profile of sympathetic ophthalmia (SO)

The authors undertook this study to examine the clinical profile of patients aged <18 years with SO over the past 20 years. This was a hospital-based retrospective study from 1997 to 2017. SO is a diagnosis of bilateral panuveitis following...

OCT angiography metrics in children

This prospective study aimed to quantify the vessel density of both the macular and optic nerve and foveal avascular zone (FAZ) values in 92 normal eyes of 92 children (42 boys, 50 girls) aged 13.4 ±2.65 years (seven to 18)....

Comparison of two visual acuity test versions for different distances in a paediatric population

The authors present the findings of a study which aimed to determine whether using 2 metre and 4 metre retro-illuminated ETDRS charts are comparable in children. Order of testing was standardised (right eye, left eye, binocular), however different charts were...

Long-standing flattening effects on the globe following spaceflight

Posterior globe flattening has been well-documented in astronauts both during and after long-duration spaceflight (LDSF). This globe flattening is thought to be due to the disc centred anterior forces created by elevated volume and / or pressure within the optic...

Adjuvant radiotherapy in orbital malignancy

This is a retrospective review of high dose volumetric modulated arc radiotherapy (VMAT) for adjuvant treatment of patients with orbital malignancy who had already undergone local excision or exenteration. VMAT differs from conventional external beam radiotherapy in that it is...

FA findings in treatment-naive premature infants

This retrospective study examined fluorescein angiography (FA) images of 162 eyes of 81 treatment-naive infants with retinal vascular immaturity and persistent avascular retina (PAR) despite exceeding postmenstrual age of 60 weeks. Disc diameter (DD), optic disc-to-fovea distance (FD), the length...

Natural history of idiopathic intracranial hypertension depending on incidental or symptomatic presentation

The authors present a large retrospective review cohort of consecutive patients diagnosed or presumed idiopathic intracranial hypertension (IIH) over a three-year period at a single tertiary centre. Patients on medication with a known aetiology for IIH were excluded. The cohort...

Pupil abnormalities after orbital surgery

This is a retrospective review of 287 patients who underwent removal of an orbital cavernous haemangioma (cavernous venous malformation), to ascertain the incidence of surgically induced pupillary abnormalities. Forty-four patients had lesions removed from the anterior or extraconal orbit, none...