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Auteur Jun Zhang
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Ajouter le résultat dans votre panier Affiner la rechercheEpidemiology and Burden of Astigmatism: A Systematic Literature Review / Jun Zhang in OVS : Optometry & Vision Science, vol. 100, 03 (Mars 2023)
[article]
in OVS : Optometry & Vision Science > vol. 100, 03 (Mars 2023)
Titre : Epidemiology and Burden of Astigmatism: A Systematic Literature Review Type de document : article de périodique Auteurs : Jun Zhang ; Yifei Wu ; Bhavna Sharma ; Ritu Gupta ; Shantanu Jawla ; Mark A. Bullimore Année de publication : 2023 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]:A:Astigmatisme:Astigmatisme / épidémiologie
[Thésaurus Mesh]Astigmatisme
[Thésaurus Mesh]Revue de la littérature
[Thésaurus Mesh]Signes et symptômesRésumé : SIGNIFICANCE: This is the first literature review to report the epidemiology, patient burden, and economic burden of astigmatism in the general adult population. The unmet needs of astigmatism patients with coexisting ocular conditions (cataract, glaucoma, dry eye, presbyopia, or macular degeneration) and risks associated with untreated astigmatism are also reviewed and reported. PURPOSE: This study aimed to identify, report, and summarize the published literature on epidemiology, patient burden, and economic burden of astigmatism using a systematic literature review. METHODS: MEDLINE, EMBASE, and Cochrane Library databases were searched (January 1996 to May 2021). Search results were limited to the English language. Proceedings (2018 to 2021) from ophthalmology congresses were searched along with gray literature using the Google Scholar platform. RESULTS: The literature search yielded 6804 citations, of which 125 met the inclusion criteria (epidemiology, 68; patient burden, 60; economic burden, 6). Astigmatism prevalence in the general population varied from 8 to 62%, with higher rates in individuals 70 years or older. The prevalence of with-the-rule astigmatism was higher in individuals 40 years or younger, whereas rates of against-the-rule and oblique astigmatism increased with age. Astigmatic patients experienced decreased vision quality, increased glare (53 to 77%), haloes (28 to 80%), night-time driving difficulties (66%), falls, and spectacle dependence (45 to 85%). Astigmatic patients performed vision-related tasks slower (1 D, 9% slower; 2 D, 29% slower) and made more errors (1 D, 38% more errors; 2 D, 370% more errors) compared with fully corrected individuals. In cataract patients with astigmatism, the annual mean per-patient productivity loss costs ranged from €55 ($71) to €84 ($108), and mean informal care costs ranged from €30 ($39) to €55 ($71) with a mean of 2.3 to 4.1 hours spent on informal care. CONCLUSIONS: Uncorrected astigmatism decreases patients' vision-related quality of life, decreases productivity among working-age adults, and poses an economic burden on patients and their families. Note de contenu :
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Cote Support Localisation Section Disponibilité aucun exemplaire Visual Demand and Acuity Reserve of Chinese versus English Newspapers / Jun Zhang in OVS : Optometry & Vision Science, vol. 97, 10 (Octobre 2020)
[article]
in OVS : Optometry & Vision Science > vol. 97, 10 (Octobre 2020)
Titre : Visual Demand and Acuity Reserve of Chinese versus English Newspapers Type de document : article de périodique Auteurs : Jun Zhang ; Jingbo Liu ; Srichand Jasti ; Rajaraman Suryakumar ; Mark A. Bullimore Année de publication : 2020 Langues : Français (fre) Descripteurs (mots clés) : [Thésaurus Mesh]Acuité visuelle
[Thésaurus Mesh]Compréhension
[Thésaurus Mesh]Langage
[Thésaurus Mesh]LectureMots-clés : lisibilité Résumé :
SIGNIFICANCE: This study suggests that Chinese newspaper characters are more legible than English newspaper letters. Characters in Chinese newspapers have higher acuity reserve than English newspapers. PURPOSE: The purpose of this study was to evaluate visual demand and acuity reserve for Chinese newspapers in comparison with published data on U.S. newspapers. METHODS: The test distances for visual acuity in Chinese clinical studies were reviewed systematically. Characters from different sections of newspapers printed in simplified Chinese were evaluated. The character height, frequency, and visual demand and acuity reserve of each newspaper section were determined for Chinese characters of the six different levels of complexity. RESULTS: More than 70% of Chinese clinical studies measure near visual acuity at either 33 or 40 cm. The height of Chinese characters ranged from 1.95 to 3.28 mm across different sections of five newspapers compared with 1.0 to 2.0 mm for English letters. The frequency of Chinese characters from least to most complex ranged from 7 to 34% across 12 sections of one Chinese newspaper. The angular threshold across the six complexity levels of Chinese characters ranged from 4.62 to 5.93 arcmin (0.54 to 0.69 mm at 40-cm reading distance) with a weighted angular threshold of 5.18 arcmin compared with 3.37 arcmin (0.39 mm) for the English letters. For Chinese newspapers, at 40-cm reading distance, the acuity reserve for the smallest and largest median size was 3.55 and 4.61, respectively. CONCLUSIONS: Chinese characters are larger than English characters in all newspaper sections newspapers by a factor of 1.60 to 2.34. Given that Chinese characters need to be 1.54 times larger than English letters to provide the same acuity reserve, on average, Chinese newspapers are more legible than U.S. English newspapers.
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