Interactive Thresholding of Central Acuity under Contrast and Luminance Conditions Mimicking Real World Environments: 1. Evaluation against LogMAR Charts Article Swipe
Stephen H. Sinclair
,
Walter Gutstein
,
Peter Presti
,
Rachel V. North
·
YOU?
·
· 2015
· Open Access
·
· DOI: https://doi.org/10.4172/jcsb.1000193
YOU?
·
· 2015
· Open Access
·
· DOI: https://doi.org/10.4172/jcsb.1000193
Purpose:The Central Vision Analyzer (CVA) is an interactive, automated computer device that rapidly thresholds central acuity under conditions mimicking customary photopic and mesopic activities.In sequence, the CVA may test up to 6 environments, and in this series was used to test 3 mesopic environments (98% and 50% MC against 1.6 cd/m 2 background, 25% MC against 5 cd/m 2 ), then 3 glare environments (98%, 10% and 8% MC, against 200 cd/m 2 background).This report compares the CVA thresholded acuity with that measured utilizing standard letter acuity charts. Methods:In 481 normal eyes acuity was measured with best spectacle and contact lens refraction using both CVA and 0.1 logMAR ETDRS charts presenting similar contrast and luminance.In addition for 162 emmetropic, eyes, acuity was tested with a 15% MC chart placed outdoors with sun overhead and with sun at 15° off-axis and compared with the CVA thresholded acuity at 10% and 8% MC presented in a darkened room.Results: All CVA modules demonstrated high Pearson correlation coefficients (r=0.51 to r=0.94, p<0.01),Bland and Altman statistical similarity with the acuity measured from similar contrast charts as well as between the acuity measured with a 15% MC letter chart with the sun overhead and CVA 10% glare module and between acuity with a 15% MC chart viewed with the sun 15° off-axis and that with CVA 8% glare module presented in the darkened room. Conclusions:The CVA demonstrates the ability to accurately threshold the acuity of normal eyes compared with chart acuity under conditions of contrast, luminance and fixation times simulating normal photopic and mesopic activities and appears to provide the clinician rapidly with a better understanding of visual function under a variety of day and evening tasks.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.4172/jcsb.1000193
- https://www.omicsonline.org/open-access/interactive-thresholding-of-central-acuity-under-contrast-and-luminance-conditions-mimicking-real-world-environments-1-evaluation-againstlogmar-charts-jcsb-1000193.pdf
- OA Status
- bronze
- Cited By
- 3
- References
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- Related Works
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- OpenAlex ID
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All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W2596797177Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.4172/jcsb.1000193Digital Object Identifier
- Title
-
Interactive Thresholding of Central Acuity under Contrast and Luminance Conditions Mimicking Real World Environments: 1. Evaluation against LogMAR ChartsWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2015Year of publication
- Publication date
-
2015-01-01Full publication date if available
- Authors
-
Stephen H. Sinclair, Walter Gutstein, Peter Presti, Rachel V. NorthList of authors in order
- Landing page
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https://doi.org/10.4172/jcsb.1000193Publisher landing page
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https://www.omicsonline.org/open-access/interactive-thresholding-of-central-acuity-under-contrast-and-luminance-conditions-mimicking-real-world-environments-1-evaluation-againstlogmar-charts-jcsb-1000193.pdfDirect link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
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bronzeOpen access status per OpenAlex
- OA URL
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https://www.omicsonline.org/open-access/interactive-thresholding-of-central-acuity-under-contrast-and-luminance-conditions-mimicking-real-world-environments-1-evaluation-againstlogmar-charts-jcsb-1000193.pdfDirect OA link when available
- Concepts
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Contrast (vision), Thresholding, Luminance, Computer science, Visual acuity, Optometry, Artificial intelligence, Cartography, Computer vision, Geography, Ophthalmology, Medicine, Image (mathematics)Top concepts (fields/topics) attached by OpenAlex
- Cited by
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3Total citation count in OpenAlex
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2025: 1, 2016: 1, 2015: 1Per-year citation counts (last 5 years)
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51Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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| referenced_works | https://openalex.org/W647835105, https://openalex.org/W1575299154, https://openalex.org/W8127479, https://openalex.org/W2058398268, https://openalex.org/W1981223543, https://openalex.org/W2107878854, https://openalex.org/W1544132144, https://openalex.org/W2069452510, https://openalex.org/W189973038, https://openalex.org/W2054086219, https://openalex.org/W2075665662, https://openalex.org/W1999627444, https://openalex.org/W120578834, https://openalex.org/W1967465697, https://openalex.org/W2057038561, https://openalex.org/W2053676663, https://openalex.org/W2061188111, https://openalex.org/W2053754605, https://openalex.org/W1985510866, https://openalex.org/W2033698521, https://openalex.org/W2011468034, https://openalex.org/W2606885192, https://openalex.org/W2089143287, https://openalex.org/W2053078108, https://openalex.org/W2088695759, https://openalex.org/W1990525650, https://openalex.org/W1979231358, https://openalex.org/W4237116629, https://openalex.org/W2058999126, https://openalex.org/W4361772798, https://openalex.org/W2098947662, https://openalex.org/W4385791713, https://openalex.org/W9267837, https://openalex.org/W2063593908, https://openalex.org/W1543130240, https://openalex.org/W2014862579, https://openalex.org/W1205745193, https://openalex.org/W1994998336, https://openalex.org/W2036711557, https://openalex.org/W2028278286, https://openalex.org/W2013097262, https://openalex.org/W2127534068, https://openalex.org/W2032030838, https://openalex.org/W2074317014, https://openalex.org/W1531209743, https://openalex.org/W1989611768, https://openalex.org/W2016274652, https://openalex.org/W1972907167, https://openalex.org/W2066585955, https://openalex.org/W2011302124, https://openalex.org/W2001455112 |
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| abstract_inverted_index.2 | 51, 58, 72 |
| abstract_inverted_index.3 | 41, 61 |
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| abstract_inverted_index.6 | 31 |
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| abstract_inverted_index.1.6 | 49 |
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| abstract_inverted_index.50% | 46 |
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| abstract_inverted_index.eyes, | 119 |
| abstract_inverted_index.glare | 62, 200, 221 |
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| abstract_inverted_index.Altman | 169 |
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| abstract_inverted_index.charts | 109, 179 |
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| corresponding_author_ids | https://openalex.org/A5102797671 |
| countries_distinct_count | 2 |
| institutions_distinct_count | 4 |
| corresponding_institution_ids | https://openalex.org/I159548981, https://openalex.org/I72816309 |
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| citation_normalized_percentile.is_in_top_10_percent | False |