Abstract:
IMPORTANCE:We define a Reading Accessibility Index for evaluating reading in individuals with normal and low vision. OBJECTIVE:To compare the Reading Accessibility Index with data from the Impact of Cataracts on Mobility (ICOM) study. DESIGN, SETTING, AND PARTICIPANTS:This investigation was a secondary data analysis from the ICOM study performed between July 1, 2014, and September 20, 2015, at 12 eye clinics in Alabama from October 1, 1994, through March 31, 1996. Participants were 321 adults with cataract (n = 92), pseudophakia (n = 131), or natural crystalline lenses without cataract (n = 98). MAIN OUTCOMES AND MEASURES:The Reading Accessibility Index (hereafter referred to using the abbreviation ACC for the first 3 letters of Accessibility) is defined as an individual's mean reading speed measured across the 10 largest print sizes on the MNREAD Acuity Chart (Precision Vision) (0.4-1.3 logarithm of the minimum angle of resolution at 40 cm), normalized by 200 words per minute, which was the mean value for a group of 365 normally sighted young adults. The ACC is a single-value measure that captures an individual's range of accessible print sizes and reading fluency within this range. RESULTS:The study cohort comprised 321 participants. Their age range was 55 to 85 years, and 157 (48.9%) were female. The ACCs for the ICOM study participants ranged from 0.19 to 1.33, where 1.00 is the mean value for normally sighted young adults. The ACC for the cataract group (mean [SD], 0.65 [0.18]) was significantly lower than that for the pseudophakia group (mean [SD], 0.77 [0.16]) and the control group (mean [SD], 0.76 [0.19]) (P < .001 for both). The correlation between the ACC and Early Treatment Diabetic Retinopathy Study visual acuity (r = -0.22) and Pelli-Robson contrast sensitivity (r = 0.20) was weaker than that with a reading-related measure of instrumental activities of daily living (r = -0.60) (P < .001 for both). CONCLUSIONS AND RELEVANCE:The ACC represents an individual's access to text across the range of print sizes found in everyday life. Its calculation does not rely on curve fitting and provides a direct comparison with the performance of normally sighted individuals. Changes in an individual's ACC might be used to evaluate the effect of ophthalmic treatment, rehabilitation programs, or assistive technology on reading accessibility. Data from the ICOM study show that the ACC reflects characteristics of reading performance in everyday life and is sensitive to improved reading accessibility for pseudophakic eyes.
journal_name
JAMA Ophthalmoljournal_title
JAMA ophthalmologyauthors
Calabrèse A,Owsley C,McGwin G,Legge GEdoi
10.1001/jamaophthalmol.2015.6097subject
Has Abstractpub_date
2016-04-01 00:00:00pages
398-405issue
4eissn
2168-6165issn
2168-6173pii
2487490journal_volume
134pub_type
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pub_type: 杂志文章,多中心研究,随机对照试验
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更新日期:2014-03-01 00:00:00
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pub_type: 杂志文章,多中心研究
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abstract:IMPORTANCE:The clinical features of the follicular subtype of ocular adnexal lymphoma (OAL) have not been previously evaluated in a large cohort. OBJECTIVE:To characterize the clinical features of follicular OAL. DESIGN, SETTING, AND PARTICIPANTS:We performed a retrospective multicenter study that involved 6 eye canc...
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更新日期:2014-07-01 00:00:00
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pub_type: 杂志文章,随机对照试验
doi:10.1001/jamaophthalmol.2014.1019
更新日期:2014-08-01 00:00:00
abstract:IMPORTANCE:Accurate diagnosis of choroidal melanoma is challenging and has important implications for both physicians and patients. We assessed the utility of quantification of fundus autofluorescence in the evaluation and follow-up of choroidal nevomelanocytic tumors. OBJECTIVE:To assess the utility of autofluorescen...
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更新日期:2013-08-01 00:00:00
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abstract:Importance:Congenital stationary night blindness (CSNB) implies a stable condition, with the major symptom being nyctalopia present at birth. Pediatric clinical presentation and the course of different genetic subtypes of CSNB have not, to our knowledge, been well described in the era of molecular genetic diagnosis. O...
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更新日期:2018-08-01 00:00:00
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更新日期:2019-06-06 00:00:00
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pub_type: 杂志文章,多中心研究,随机对照试验
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更新日期:2014-02-01 00:00:00
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更新日期:2020-12-17 00:00:00
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更新日期:2013-11-01 00:00:00
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更新日期:2017-02-01 00:00:00
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更新日期:2014-05-01 00:00:00
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更新日期:2021-01-07 00:00:00
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更新日期:2013-12-01 00:00:00
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更新日期:2019-04-01 00:00:00