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
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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
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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
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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
Percentile Distribution of Habitual-Correction Visual Acuity in a Sample of 1500 Children Aged 5 to 15 Years in Italy [PDF]
Pediatric ReportsBackground: Early identification of visual disorders in children is essential to prevent long-term visual impairment and support academic development. Despite the recognized importance of visual screenings, no universal consensus exists on which visual ...
Alessio Facchin +2 more
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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
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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
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Indian Journal of Ophthalmology, 2012 Iatrogenic keratectasia has been reported subsequent to refractive surgery or trauma. Hexagonal keratotomy (HK) is a surgical incisional technique to correct hyperopia.
Paras Mehta +2 more
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Unilateral conjunctival ulcer due to Stenotrophomonas maltophilia infection
Indian Journal of Ophthalmology, 2012 We report a case of unilateral conjunctival ulcer due to Stenotrophomonas maltophilia infection in an immunocompetent individual. A 44-year-old male presented with complaints of pain and yellowish discharge in the right eye for one week.
Padmamalini Mahendradas +3 more
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Journal of Optometry, 2008 Purpose: To quantify the difference between recognition (letter) and resolution (Landolt) visual acuity (VA) in a group of normally sighted subjects. Is it reasonable to assume that the two acuity measures are clinically equivalent?
Jonathan S. Pointer
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