Publications by authors named "Frank Proudlock"

Objective: To evaluate optic nerve head (ONH) morphology in children with craniosynostosis versus healthy controls.

Design: Single-center, prospective cohort study.

Methods: Handheld optical coherence tomography (OCT) was performed in 110 eyes of 58 children (aged 0-13 years) with craniosynostosis.

View Article and Find Full Text PDF

Introduction: Postoperative delirium in older people may result from the interaction between intrinsic brain vulnerability (e.g. neurodegeneration) and precipitating factors (e.

View Article and Find Full Text PDF

Background: Amblyopia, the most common visual impairment of childhood, is a public health concern. An extended period of optical treatment before patching is recommended by the clinical guidelines of several countries. The aim of this study was to compare an intensive patching regimen, with and without extended optical treatment (EOT), in a randomised controlled trial.

View Article and Find Full Text PDF

Purpose: Our primary aim was to compare adult full-field ERG (ffERG) responses in albinism, idiopathic infantile nystagmus (IIN), and controls. A secondary aim was to investigate the effect of within-subject changes in nystagmus eye movements on ffERG responses.

Methods: Dilated Ganzfeld flash ffERG responses were recorded using DTL electrodes under conditions of dark (standard and dim flash) and light adaptation in 68 participants with albinism, 43 with IIN, and 24 controls.

View Article and Find Full Text PDF

Purpose: This is the first systematic comparison of visual field (VF) deficits in people with albinism (PwA) and idiopathic infantile nystagmus (PwIIN) using static perimetry. We also compare best-corrected visual acuity (BCVA) and optical coherence tomography measures of the fovea, parafovea, and circumpapillary retinal nerve fiber layer in PwA.

Methods: VF testing was performed on 62 PwA and 36 PwIIN using a Humphrey Field Analyzer (SITA FAST 24-2).

View Article and Find Full Text PDF

Albinism is a spectrum disorder causing foveal hypoplasia, nystagmus, and hypopigmentation of the iris and fundus along with other visual deficits, which can all impact vision. Albinism is also associated with amblyogenic factors which could affect monocular visual acuity. The foveal appearance in albinism can range from mild foveal hypoplasia to that which is indistinguishable from the peripheral retina.

View Article and Find Full Text PDF

Purpose: To identify structural markers of active retinopathy of prematurity (ROP) in foveal and parafoveal retinal layers using hand-held optical coherence tomography.

Methods: Hand-held optical coherence tomography images (n = 278) were acquired from a prospective mixed cross-sectional longitudinal observational study of 87 participants (23-36 weeks gestational age; n = 30 with ROP, n = 57 without ROP) between 31 and 44 weeks postmenstrual age excluding treated ROP and features of cystoid macular edema. Six retinal layer thicknesses from the fovea to the parafovea were analyzed at five locations up to 1,000 µ m, temporally and nasally.

View Article and Find Full Text PDF
Article Synopsis
  • Albinism is a condition affecting pigmentation and visual system structure, prompting research into anatomical changes for improved diagnostics, particularly using a CNN called CHIASM-Net.
  • This CNN was designed to detect malformations in the optic chiasm from MRI images, using data from a significant number of control and albinism cases, and evaluated through rigorous statistical methods.
  • CHIASM-Net showed promising results with 85% accuracy and identified key areas in the optic chiasm as influential for its predictions, highlighting the potential of CNNs for visual pathway analysis in diagnostics.
View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to determine how effectively circumpapillary retinal nerve fibre layer (RNFL) thickness and macular ganglion cell layer-inner plexiform layer (GCL-IPL) thickness can identify abnormal visual function in children newly diagnosed with brain tumors.
  • Conducted on a group of 115 children aged 0-18 across four hospitals in the Netherlands, the research assessed sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) using reliable visual tests and optical coherence tomography.
  • Results showed RNFL thickness identified 74.5% of abnormal visual functions, while GCL-IPL thickness detected 41.7%. The findings suggest that normal measurements for both layers indicate a high likelihood
View Article and Find Full Text PDF

Meeting Presentation: Presented at the 2016 Association for Research in Vision and Ophthalmology meeting and at the 2015 British Isles Paediatric, Ophthalmology and Strabismus Association meeting.

Purpose: To investigate the time course of foveal development after birth in infants with albinism.

Design: Prospective, comparative cohort optical coherence tomography study.

View Article and Find Full Text PDF

Purpose: This prospective study investigates longitudinal changes in retinal structure in patients with achromatopsia (ACHM) using optical coherence tomography (OCT).

Methods: Seventeen patients (five adults, 12 children) with genetically confirmed CNGA3- or CNGB3-associated ACHM underwent ocular examination and OCT over a follow-up period of between 2 and 9.33 years (mean = 5.

View Article and Find Full Text PDF

Purpose: To quantify in patients with optic nerve head drusen (ONHD)changes after 1-year observation in: (i) optic disc and (ii) macular optical coherence tomography (OCT) parameters and (iii) the effect of age at enrolment in the study.

Design: Prospective, cross-sectional observational study using Spectral Domain-OCT (Copernicus; OPTOPOL Technology S.A.

View Article and Find Full Text PDF
Article Synopsis
  • Infantile nystagmus syndrome (INS) can change how babies see and is linked to problems in the eye's blood vessels, just like in albinism.
  • Scientists studied the eye images of 24 people with albinism, 10 with INS, and 34 people without these conditions to see how their retinal blood vessels differed.
  • The results showed fewer and thinner blood vessels in people with albinism and INS compared to those without, possibly due to issues in the part of the eye that helps blood vessel development.
View Article and Find Full Text PDF

In this paper, we present a review of how the various aspects of any study using an eye tracker (such as the instrument, methodology, environment, participant, etc.) affect the quality of the recorded eye-tracking data and the obtained eye-movement and gaze measures. We take this review to represent the empirical foundation for reporting guidelines of any study involving an eye tracker.

View Article and Find Full Text PDF

Background/aims: To investigate the foveal morphology in carriers of oculocutaneous albinism (OCA) using spectral domain optical coherence tomography (SD-OCT). A cross-sectional, observational study.

Methods: Handheld SD-OCT (Envisu C2300) was used to acquire horizontal scans through the centre of the fovea in biological parents of patients with OCA (n=28; mean age±SD=40.

View Article and Find Full Text PDF
Article Synopsis
  • - The study aimed to analyze the genotypic and phenotypic aspects of foveal hypoplasia (FH) in patients with specific genetic conditions, including albinism and PAX6 mutations, among others.
  • - In a group of 907 participants, albinism was identified as the most common cause of typical FH, and the research showed notable differences in visual acuity and FH grading based on the underlying genetic diagnosis.
  • - The findings indicated that different types of albinism exhibited varying severities of FH and visual problems, with ocular albinism and Hermansky-Pudlak syndrome showing worse outcomes compared to oculocutaneous albinism.
View Article and Find Full Text PDF

Background/objectives: Handheld fundus cameras are portable and cheaper alternatives to table-top counterparts. To date there have been no studies comparing feasibility and clinical utility of handheld fundus cameras to table-top devices. We compare the feasibility and clinical utility of four handheld fundus cameras/retinal imaging devices (Remidio NMFOP, Volk Pictor Plus, Volk iNview, oDocs visoScope) to a table-top camera (Zeiss Visucam).

View Article and Find Full Text PDF

Introduction: Paediatric intracranial hypertension (IH) is a rare but serious condition that can pose deleterious effects on the brain and vision. Estimating intracranial pressure (ICP) in children is difficult. Gold standard direct ICP measurement is invasive and carries risk.

View Article and Find Full Text PDF

Aims: To assess the diagnostic accuracy of fundoscopy and visual evoked potentials (VEPs) in detecting intracranial hypertension (IH) in patients with craniosynostosis undergoing spring-assisted posterior vault expansion (sPVE).

Methods: Children with craniosynostosis undergoing sPVE and 48-hour intracranial pressure (ICP) monitoring were included in this single-centre, retrospective, diagnostic accuracy study. Data for ICP, fundoscopy and VEPs were analysed.

View Article and Find Full Text PDF

We aimed to investigate structural retinal changes in malarial retinopathy (MR) using hand-held optical coherence tomography (HH-OCT) to assess its diagnostic potential. Children with MR (n = 43) underwent ophthalmoscopy, fluorescein angiography and HH-OCT during admission, 1-month (n = 31) and 1-year (n = 8) post-discharge. Controls were comatose patients without malaria (n = 6) and age/sex-matched healthy children (n = 43).

View Article and Find Full Text PDF