Assessing Reading Ability in Normal and Low Vision Using the Mnread Reading Acuity Chart: Preliminary Results

1997 ◽  
pp. 247-250
Author(s):  
James E. Bailey ◽  
Vasudevan Lakshminaryanan
Keyword(s):  
Reading Ability ◽  
Low Vision ◽  
Reading Acuity ◽  
Preliminary Results

Mobile Text Reader for People with Low Vision

2015 ◽  
Vol 74 (6) ◽  
Author(s):  
Teng Ren Sin ◽  
Eileen Su Lee Ming ◽  
Yeong Che Fai ◽  
Ong Jian Fu ◽  
Sim Yang Shane
Keyword(s):  
Mobile Application ◽  
Character Recognition ◽  
Optical Character Recognition ◽  
Reading Ability ◽  
Low Vision ◽  
Image Stitching ◽  
Text To Speech ◽  
Composite Image ◽  
Text Information ◽  
Screen Magnifier

People with low vision have visual acuity less than 6/18 and at least 3/60 in the better eye, with correction. The limited vision requires them to enhance their reading ability using magnifying glass or electronic screen magnifier. However, people with severe low vision have difficulty and suffer fatigue from using such assistive tool. This paper presents the development of a mobile text reader dedicated for people with low vision. The mobile text reader is developed as a mobile application that allows user to capture an image of texts and then translate the texts into audio format. One main contribution of this work compared to typical optical character recognition (OCR) engines or text-to-speech engines is the addition of image stitching feature. The image stitching feature can produce one single image from multiple poorly aligned images, and is integrated into the process of image acquisition. Either single or composite image is subsequently uploaded to a cloud-based OCR engine for robust character recognition. Eventually, a text-to-speech (TTS) synthesizer reproduces the word recognized in a natural-sounding speech. The whole series of computation is implemented as a mobile application to be run from a smartphone, allowing the visual impaired to access text information independently. 

scholarly journals Simulating Visibility and Reading Performance in Low Vision

2021 ◽  
Vol 15 ◽  
Author(s):  
Ying-Zi Xiong ◽  
Quan Lei ◽  
Aurélie Calabrèse ◽  
Gordon E. Legge
Keyword(s):  
Young Adults ◽  
Contrast Sensitivity ◽  
Low Vision ◽  
Reading Speed ◽  
Reading Performance ◽  
Digital Text ◽  
Reading Acuity ◽  
Vision Simulation ◽  
Print Size ◽  
Better Than

PurposeLow vision reduces text visibility and causes difficulties in reading. A valid low-vision simulation could be used to evaluate the accessibility of digital text for readers with low vision. We examined the validity of a digital simulation for replicating the text visibility and reading performance of low-vision individuals.MethodsLow-vision visibility was modeled with contrast sensitivity functions (CSFs) with parameters to represent reduced acuity and contrast sensitivity. Digital filtering incorporating these CSFs were applied to digital versions of the Lighthouse Letter Acuity Chart and the Pelli-Robson Contrast Sensitivity Chart. Reading performance (reading acuity, critical print size, and maximum reading speed) was assessed with filtered versions of the MNREAD reading acuity Chart. Thirty-six normally sighted young adults completed chart testing under normal and simulated low-vision conditions. Fifty-eight low-vision subjects (thirty with macular pathology and twenty-eight with non-macular pathology) and fifteen normally sighted older subjects completed chart testing with their habitual viewing. We hypothesized that the performance of the normally sighted young adults under simulated low-vision conditions would match the corresponding performance of actual low-vision subjects.ResultsWhen simulating low-vision conditions with visual acuity better than 1.50 logMAR (Snellen 20/630) and contrast sensitivity better than 0.15 log unit, the simulation adequately reduced the acuity and contrast sensitivity in normally sighted young subjects to the desired low-vision levels. When performing the MNREAD test with simulated low vision, the normally sighted young adults had faster maximum reading speed than both the Non-macular and Macular groups, by an average of 0.07 and 0.12 log word per minute, respectively. However, they adequately replicated the reading acuity as well as the critical print size, up to 2.00 logMAR of both low-vision groups.ConclusionA low-vision simulation based on clinical measures of visual acuity and contrast sensitivity can provide good estimates of reading performance and the accessibility of digital text for a broad range of low-vision conditions.

scholarly journals Evaluation of the iPad as a low vision aid for improving reading ability

2014 ◽  
pp. 17 ◽  
Author(s):  
Kakarla Chalam ◽  
Kumar Sambhav ◽  
Sandeep Grover ◽  
Shamim Haji
Keyword(s):  
Reading Ability ◽  
Low Vision

scholarly journals Introduction of a digital near-vision reading test for normal and low vision adults: development and validation

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Georgios Labiris ◽  
Eirini-Kanella Panagiotopoulou ◽  
Eleftherios Chatzimichael ◽  
Maria Tzinava ◽  
Asimina Mataftsi ◽  
...  
Keyword(s):  
Low Vision ◽  
Reading Speed ◽  
Intraclass Correlation ◽  
Reading Test ◽  
Viewing Distance ◽  
Greek Language ◽  
Reading Acuity ◽  
Near Vision ◽  
Retest Reliability ◽  
Test Retest Reliability

Abstract Background MNREAD is an advanced near-vision acuity chart that has already been translated and validated in Greek language. Considering that no validated Greek digital near-vision test exists, our primary objective was to develop and validate a digital near-vision reading test based on the fundamental properties of the Greek printed MNREAD (MNREAD-GR). Methods This is a prospective, comparative study. A digital near-vision chart was developed (Democritus Digital Acuity Reading Test – DDART) with text size calibration, audio recording for automatic reading timing, as well as automatic calculation of reading acuity (RA), maximum reading speed (MRS), critical print size (CPS) and reading accessibility index (ACC). Normal and low vision subjects participated in the validation process, responding to MNREAD-GR and DDART at the same day, at a 40 cm viewing distance. Differences in all parameters between the charts were compared with t-test and intraclass correlation coefficients (ICCs). Within 15 days, all participants responded again to DDART in a different set of sentences to assess its test-retest reliability. Results One hundred patients (normal vision group - NVG: 70 patients; low vision group - LVG: 30 patients) responded to both reading tests. Non-significant differences were detected for all parameters between DDART and MNREAD-GR except for MRS and ACC that were significantly higher in MNREAD-GR in NVG (p <  0.01). NVG participants demonstrated sufficient ICCs that ranged from 0.854 to 0.963, while LVG demonstrated ICCs for RA, ACC, MRS and CPS equal to 0.986, 0.894, 0.794 and 0.723, respectively. All parameters calculated with DDART demonstrated excellent test-retest reliability (ICCs: 0.903 – 0.956). Conclusions The proposed reading test presented comparable validity and repeatability to MNREAD-GR suggesting that it can be used both in normal and low vision Greek patients. Trial registration ClinicalTrials.gov, NCT04242836. Registered 24 January 2020 – Retrospectively registered.

The CCH Vision Stimulation Program for Infants with Low Vision: Preliminary Results

1992 ◽  
Vol 86 (1) ◽  
pp. 33-37 ◽  
Author(s):  
L.E. Leguire ◽  
R.R. Fellows ◽  
G.L. Rogers ◽  
D.L. Bremer ◽  
R.D. Fillman
Keyword(s):  
Motor Function ◽  
Visually Impaired ◽  
Low Vision ◽  
Cross Sectional ◽  
Preliminary Results ◽  
Children's Hospital ◽  
Children’S Hospital ◽  
Visual Motor ◽  
Home Stimulation ◽  
Stimulation Of

This article describes a study of the Columbus Children's Hospital (CCH) vision stimulation program involving the stimulation of 15 visually impaired infants and comparisons with 14 visually impaired infants who did not receive the in-home stimulation and a cross-sectional group of 50 similar aged normal infants. The results document the benefits of appropriate vision stimulation for increasing the neural foundation for vision and visual-motor function in visually impaired infants.

The use of the NARA for assessing the reading ability of children with low vision

2002 ◽  
Vol 20 (2) ◽  
pp. 68-75 ◽  
Author(s):  
Graeme Douglas ◽  
Michael Grimley ◽  
Eileen Hill ◽  
Rachel Long ◽  
Michael Tobin
Keyword(s):  
Reading Ability ◽  
Low Vision

Prevalence of Blindness and Low Vision in a Rural Population in Northern China: Preliminary Results from a Population-Based Survey

2012 ◽  
Vol 19 (5) ◽  
pp. 272-277 ◽  
Author(s):  
Xuefei Li ◽  
Qiang Zhou ◽  
Lanping Sun ◽  
Zhengang Wang ◽  
Song Han ◽  
...  
Keyword(s):  
Rural Population ◽  
Low Vision ◽  
Northern China ◽  
Population Based ◽  
Preliminary Results ◽  
Population Based Survey

scholarly journals Reading Acuity as a Predictor of Low-Vision Reading Performance

2018 ◽  
Vol 59 (12) ◽  
pp. 4798 ◽  
Author(s):  
Ying-Zi Xiong ◽  
Aurélie Calabrèse ◽  
Allen M. Y. Cheong ◽  
Gordon E. Legge
Keyword(s):  
Low Vision ◽  
Reading Performance ◽  
Reading Acuity
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