Medicine and Health Sciences Commons^™

Agreement Between Lea Symbols And Patti Pics Visual Acuity In Children And Adults, Arjun Sapkota, Sanjeeta Sitaula, Gauri Shankar Shrestha, Niraj Dev Joshi, Bipin Koirala, Nabin Paudel

Articles

Patti Pics (PP) and Lea Symbols (LS) are commonly used by eye care practitioners worldwide. Although the relationship between the two tests is fairly well understood, the availability of different chart designs (single optotypes, multiple optotypes, multiple optotypes with crowding box) merits futher understanding. The purpose of this study is to explore the agreement between the acuity measures obtained with Patti Pics and Lea Symbols in children and adults and compare their performance with the Sloan Letter (SL) chart in adults.

Agreement Between Lea Symbols And Patti Pics Visual Acuity In Children And Adults, Arjun Sapkotaa, Sanjeeta Sitaula, Gauri Shankar Shresthab, Niraj Dev Joshib, Bipin Koiralaa Bipin Koiralaa, Nabin Paudel

Articles

Patti Pics (PP) and Lea Symbols (LS) are commonly used by eye care practitioners worldwide. Although the relationship between the two tests is fairly well understood, the availability of different chart designs (single optotypes, multiple optotypes, multiple optotypes with crowding box) merits futher understanding. The purpose of this study is to explore the agreement between the acuity measures obtained with Patti Pics and Lea Symbols in children and adults and compare their performance with the Sloan Letter (SL) chart in adults. Methods: Monocular visual acuity was obtained from ninety-three 3 to 5-year-old children using Patti Pics and Lea Symbols. Acuities …

Visual Factors Associated With Physical Activity In Schoolchildren, Síofra Harrington, John Kearney Prof, Veronica O'Dwyer Dr

Articles

Clinical relevance Physical activity is an essential part of childhood physical and mental development. Recent research identified visual problems associated with a sedentary lifestyle in children in Ireland.

Background This study explored the association between visual function in children and their engagement with physical activities outside school.

Methods Participants were 1,626 schoolchildren (728 aged 6–7 years, 898 old 12–13 years) in randomly selected schools in Ireland. Before data collection, parents/legal guardians of participants completed a standardised questionnaire reporting physical activity as no activity (mostly on screens), light activity (occasional walking/cycling), moderate activity (/week engaged in sports), or regular activity ( …

Big Data Analysis Of Vision Screening Standards Used To Evaluate Fitness To Drive, Michael Moore, John Butler, Daniel Ian Flitcroft, James Loughman

Articles

Purpose: Visual acuity (VA) assessment is the most commonly performed vision screening method for drivers. The standards and repeat assessment intervals used, however, are arbitrary, lack an evidence base and are highly variable across different countries. This study utilizes the power of Big Data to provide evidence-based recommendations for standardized driver vision screening.

Methods: Anonymized electronic medical record data were gathered from 40 Irish optometry practices comprising 81,184 unique patients. A Kaplan-Meier Survival (KMS) analysis was used to determine the effect of increasing age and time since screening on the likelihood of passing the VA standard for driving. A logistic …

Trailmaking Test Performance Contributes To Subjective Judgment Of Visual Efficiency In Older Adults, Annalisa Setti, James Loughman, George Savva, Rose Anne Kenny

Articles

Introduction.

The determinant factors that influence self-reported quality of vision have yet to be fully elucidated. This study evaluated a range of contextual information, established psychophysical tests, and in particular, a series of cognitive tests as potentially novel determinant factors.

Materials &Methods. Community dwelling adults (aged 50+) recruited to Wave 1 of The Irish Longitudinal Study on Ageing, excluding those registered blind, participated in this study (N = 5,021). Self-reports of vision were analysed in relation to visual acuity and contrast sensitivity, ocular pathology, visual (Choice Response Time task; TrailMaking Test) and global cognition. Contextual factors such as having visited …

The Relationship Between Macular Pigment And Visual Performance, James Loughman, Mukunda Akkali, Stephen Beatty, Grainne Scanlon, Peter Davison, Veronica O'Dwyer, Thomas Cantwell, Philip Major, Jim Stack, John Nolan

Articles

This study was designed to assess whether macular pigment optical density (MPOD) is associated with visual performance. One hundred and forty-two young healthy subjects were recruited. Macular pigment optical density and visual performance were assessed by psychophysical tests including best corrected visual acuity (BCVA), mesopic and photopic contrast sensitivity, glare sensitivity, photostress recovery time (PRT). Measures of central visual function, including BCVA and contrast sensitivity, were positively associated with MPOD (p < 0.05, for all). Photostress recovery and glare sensitivity were unrelated to MPOD (p > 0.05). A longitudinal, placebo-controlled and randomized supplementation trial will be required to ascertain whether augmentation of MPOD can influence visual performance.

The Relationship Between Macular Pigment And Visual Performance, James Loughman, Peter Davison, Grainne Scanlon, Veronica O'Dwyer

Conference Papers

Abstract Purpose:Macular pigment (MP), as a powerful antioxidant, and short wavelength optical filter, which is anatomically concentrated at the macula, may theoretically contribute to visual performance by attenuating the effects of chromatic aberration and light scatter, or by optimizing retinal health. This study was designed to assess whether macular pigment optical density (MPOD) is associated with visual performance. Methods:142 young (mean age ± SD = 29 ± 6 years) healthy subjects were recruited into two separate study sites: Waterford Institute of Technology (WIT) and Technological University Dublin (DIT). The spatial profile of MPOD (i.e. at 0.5, 0.25, 1, 1.75 and …

Macular Pigment And Its Contribution To Spatial Vision, James Loughman, Peter Davison, Grainne Scanlon, Veronica O'Dwyer

Conference Papers

Purpose:The optical properties and anatomic distribution of macular pigment (MP) are such that it may theoretically contribute to visual performance by attenuating the effects of chromatic aberration and light scatter. The Collaborative Optical Macular Pigment Assessment (COMPASS) study is a placebo-controlled, randomized and double-blind clinical trial designed to assess whether MP optical density (MPOD) influences spatial vision by attenuating short wavelength light. Preliminary analysis of baseline findings, prior to supplementation, is presented here. Methods:119 young (mean=29+/-6 years) healthy subjects were recruited. The spatial profile of MPOD was assessed by customized heterochromatic flicker photometry. Visual performance was assessed by psychophysical tests …