Equivalent legibility font size for traditional Chinese character compared to early treatment diabetic retinopathy study near visual acuity
PURPOSES: To investigate the legibility of a standardized logarithmic print size of traditional Chinese (TC) characters and compare it with Early Treatment Diabetic Retinopathy Study (ETDRS) near chart. MATERIALS AND METHODS: A total of 1243 commonly used TC characters were chosen and divided into t...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2022-01-01
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| Series: | Taiwan Journal of Ophthalmology |
| Subjects: | |
| Online Access: | http://www.e-tjo.org/article.asp?issn=2211-5056;year=2022;volume=12;issue=1;spage=68;epage=73;aulast=Wang |
| _version_ | 1811339446938763264 |
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| author | Chia-Yu Wang Elizabeth P Shen Shu-Ya Wu Wei-Cherng Hsu |
| author_facet | Chia-Yu Wang Elizabeth P Shen Shu-Ya Wu Wei-Cherng Hsu |
| author_sort | Chia-Yu Wang |
| collection | DOAJ |
| description | PURPOSES: To investigate the legibility of a standardized logarithmic print size of traditional Chinese (TC) characters and compare it with Early Treatment Diabetic Retinopathy Study (ETDRS) near chart.
MATERIALS AND METHODS: A total of 1243 commonly used TC characters were chosen and divided into three groups according to its stroke complexity: Group A with 2–9 strokes, Group B with 10–17 strokes, and Group C with 18–25 strokes. For each group of characters, near charts were created using randomly chosen characters arranged in decreasing logarithmic size. In a well-illuminated room, healthy controls were fully corrected to test both ETDRS near chart and our set of TC near charts. The smallest legible font sizes (SLFS) in TC near charts were recorded and analyzed.
RESULTS: Forty-two healthy eyes (21 participants) (age 29 ± 8.9 years old) were included. The mean near best-corrected visual acuity (nBCVA) in ETDRS chart was 0.06 ± 0.05 logMAR. We found that the mean SLFS in TC charts (0.33 ± 0.09 logMAR) was significantly larger than the nBCVA in ETDRS chart (P < 0.001). The SLFS of Group B and the SLFS of Group C was significantly larger than that of Group A (P < 0.001).
CONCLUSION: According to our results, to recognize TC characters, normal-sight readers need a 0.22–0.30 logMAR (1.7–2.0 fold) enlargement of the acuity size measured by ETDRS near chart. The low-stroke TC charts may provide a new method to assess the postsurgical outcomes for comparable functional visual acuity in reading TC characters. |
| first_indexed | 2024-04-13T18:26:45Z |
| format | Article |
| id | doaj.art-9450a2a6345e480c86798c179c83d746 |
| institution | Directory Open Access Journal |
| issn | 2211-5056 2211-5072 |
| language | English |
| last_indexed | 2024-04-13T18:26:45Z |
| publishDate | 2022-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Taiwan Journal of Ophthalmology |
| spelling | doaj.art-9450a2a6345e480c86798c179c83d7462022-12-22T02:35:13ZengWolters Kluwer Medknow PublicationsTaiwan Journal of Ophthalmology2211-50562211-50722022-01-01121687310.4103/tjo.tjo_8_21Equivalent legibility font size for traditional Chinese character compared to early treatment diabetic retinopathy study near visual acuityChia-Yu WangElizabeth P ShenShu-Ya WuWei-Cherng HsuPURPOSES: To investigate the legibility of a standardized logarithmic print size of traditional Chinese (TC) characters and compare it with Early Treatment Diabetic Retinopathy Study (ETDRS) near chart. MATERIALS AND METHODS: A total of 1243 commonly used TC characters were chosen and divided into three groups according to its stroke complexity: Group A with 2–9 strokes, Group B with 10–17 strokes, and Group C with 18–25 strokes. For each group of characters, near charts were created using randomly chosen characters arranged in decreasing logarithmic size. In a well-illuminated room, healthy controls were fully corrected to test both ETDRS near chart and our set of TC near charts. The smallest legible font sizes (SLFS) in TC near charts were recorded and analyzed. RESULTS: Forty-two healthy eyes (21 participants) (age 29 ± 8.9 years old) were included. The mean near best-corrected visual acuity (nBCVA) in ETDRS chart was 0.06 ± 0.05 logMAR. We found that the mean SLFS in TC charts (0.33 ± 0.09 logMAR) was significantly larger than the nBCVA in ETDRS chart (P < 0.001). The SLFS of Group B and the SLFS of Group C was significantly larger than that of Group A (P < 0.001). CONCLUSION: According to our results, to recognize TC characters, normal-sight readers need a 0.22–0.30 logMAR (1.7–2.0 fold) enlargement of the acuity size measured by ETDRS near chart. The low-stroke TC charts may provide a new method to assess the postsurgical outcomes for comparable functional visual acuity in reading TC characters.http://www.e-tjo.org/article.asp?issn=2211-5056;year=2022;volume=12;issue=1;spage=68;epage=73;aulast=Wangcharacterearly treatment diabetic retinopathy study visual acuitylegibilitynear charttraditional chinese |
| spellingShingle | Chia-Yu Wang Elizabeth P Shen Shu-Ya Wu Wei-Cherng Hsu Equivalent legibility font size for traditional Chinese character compared to early treatment diabetic retinopathy study near visual acuity Taiwan Journal of Ophthalmology character early treatment diabetic retinopathy study visual acuity legibility near chart traditional chinese |
| title | Equivalent legibility font size for traditional Chinese character compared to early treatment diabetic retinopathy study near visual acuity |
| title_full | Equivalent legibility font size for traditional Chinese character compared to early treatment diabetic retinopathy study near visual acuity |
| title_fullStr | Equivalent legibility font size for traditional Chinese character compared to early treatment diabetic retinopathy study near visual acuity |
| title_full_unstemmed | Equivalent legibility font size for traditional Chinese character compared to early treatment diabetic retinopathy study near visual acuity |
| title_short | Equivalent legibility font size for traditional Chinese character compared to early treatment diabetic retinopathy study near visual acuity |
| title_sort | equivalent legibility font size for traditional chinese character compared to early treatment diabetic retinopathy study near visual acuity |
| topic | character early treatment diabetic retinopathy study visual acuity legibility near chart traditional chinese |
| url | http://www.e-tjo.org/article.asp?issn=2211-5056;year=2022;volume=12;issue=1;spage=68;epage=73;aulast=Wang |
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