Comparison of visual acuity estimates using three different letter charts under two ambient room illuminations [PDF]
Indian Journal of Ophthalmology, 2012 Background: Visual acuity is an essential estimate to assess ability of the visual system and is used as an indicator of ocular health status. Aim: The aim of this study is to investigate the consistency of acuity estimates from three different clinical ...
Ai-Hong Chen +2 more
doaj +4 more sources
The role of contrast sensitivity charts and contrast letter charts in clinical practice [PDF]
Australasian journal of optometry, The, 1995 Practitioners frequently make clinical decisions based on changes in visual acuity. However, acuity is recognised to be only one aspect of visual performance. In recent years, a number of clinical chart-based tests which measure different aspects of vision based on contrast sensitivity have become available.
Russell L Woods, Joanne M Wood
exaly +4 more sources
Normative reference ranges for binocular summation as a function of age for low contrast letter charts. [PDF]
Strabismus, 2014 PURPOSE: Binocular summation (BiS), defined as the superiority of binocular over monocular viewing on visual threshold tasks, is most often studied in laboratory settings. Few studies have evaluated BiS with readily available clinical tools. Low contrast
Pineles SL +4 more
europepmc +4 more sources
Assessment of depth perception with a comprehensive disparity defined letter test: A pilot study.
PLoS ONE, 2022 Current clinical tests mostly assess stereopsis with crossed disparity at near. These tests are designed with fine targets (high spatial frequency) and may fail to capture the "functional stereopsis" in real-world scenes, which consist of a range of ...
Wei Hau Lew, Daniel R Coates
doaj +2 more sources
Binocular summation in high and low contrast letter acuities
Frontiers in Neuroscience, 2023 Binocular summation, a well-known phenomenon in letter acuity measurement, refers to the improvement in visual performance when viewing with both eyes compared to one eye alone.
Deyue Yu, Emily Watson
doaj +2 more sources
VI-OCR: “Visually Impaired” optical character recognition pipeline for text accessibility assessment [PDF]
Scientific ReportsLow vision adversely impacts daily activities, particularly reading. However, quantifying text accessibility for different levels of low vision is challenging, leading to product designs that often overlook the vision status of low vision readers.
Qingying Gao +4 more
doaj +2 more sources
Validity of digital measurement of visual acuity and contrast sensitivity in Parkinson’s disease [PDF]
BMC Digital HealthPurpose The Senaptec Sensory Station (SSS) is a device that can measure visual acuity (VA) and contrast sensitivity (CS), but validity has not been established in clinical populations.
Julia Das +7 more
doaj +2 more sources
Cone letter charts: rapid color test using a range of letter sizes. [PDF]
Graefes Arch Clin Exp Ophthalmol, 2023 Rabin J, Poole E, Hall K, Price W.
europepmc +3 more sources
VISUAL ASSESSMENT WITH LOW‐CONTRAST LETTER CHARTS [PDF]
Ophthalmic and Physiological Optics, 1986 semanticscholar +3 more sources