One-year results for myopia control of orthokeratology with different back optic zone diameters: a randomized trial using a novel multispectral-based topographer
AIM: To present the 1-year results of a prospective cohort study investigating the efficacy, potential mechanism, and safety of orthokeratology (ortho-k) with different back optic zone diameters (BOZD) for myopia control in children. METHODS: This randomized clinical study was performed between Dec....
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Press of International Journal of Ophthalmology (IJO PRESS)
2024-02-01
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| Series: | International Journal of Ophthalmology |
| Subjects: | |
| Online Access: | http://ies.ijo.cn/en_publish/2024/2/20240215.pdf |
| _version_ | 1797348644387553280 |
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| author | Wen-Ting Tang Xiang-Ning Luo Wen-Jing Zhao Jia Liao Xin-Yue Xu Hui-Dan Zhang Li Zhang |
| author_facet | Wen-Ting Tang Xiang-Ning Luo Wen-Jing Zhao Jia Liao Xin-Yue Xu Hui-Dan Zhang Li Zhang |
| author_sort | Wen-Ting Tang |
| collection | DOAJ |
| description | AIM: To present the 1-year results of a prospective cohort study investigating the efficacy, potential mechanism, and safety of orthokeratology (ortho-k) with different back optic zone diameters (BOZD) for myopia control in children. METHODS: This randomized clinical study was performed between Dec. 2020 and Dec. 2021. Participants were randomly assigned to three groups wearing ortho-k: 5 mm BOZD (5-MM group), 5.5 mm BOZD (5.5-MM group), and 6 mm BOZD (6-MM group). The 1-year data were recorded, including axial length, relative peripheral refraction (RPR, measured by multispectral refractive topography, MRT), and visual quality. The contrast sensitivity (CS) was evaluated by CSV-1000 instrument with spatial frequencies of 3, 6, 12, and 18 cycles/degree (c/d); the corneal higher-order aberrations (HOAs) were measured by iTrace aberration analyzer. The one-way ANOVA was performed to assess the differences between the three groups. The correlation between the change in AL and RPR was calculated by Pearson's correlation coefficient. RESULTS: The 1-year results of 20, 21, and 21 subjects in the 5-MM, 5.5-MM, and 6-MM groups, respectively, were presented. There were no statistical differences in baseline age, sex, or ocular parameters between the three groups (all P>0.05). At the 1-year visit, the 5-MM group had lower axial elongation than the 6-MM group (0.07±0.09 vs 0.18±0.11 mm, P=0.001). The 5-MM group had more myopic total RPR (TRPR, P=0.014), with RPR in the 15°–30° (RPR 15–30, P=0.015), 30°–45° (RPR 30–45, P=0.011), temporal (RPR-T, P=0.008), and nasal area (RPR-N, P<0.001) than the 6-MM group. RPR 15–30 in the 5.5-MM group was more myopic than that in the 6-MM group (P=0.002), and RPR-N in the 5-MM group was more myopic than that in the 5.5-MM group (P<0.001). There were positive correlations between the axial elongation and the change in TRPR (r=0.756, P<0.001), RPR 15–30 (r=0.364, P=0.004), RPR 30–45 (r=0.306, P=0.016), and RPR-N (r=0.253, P=0.047). The CS decreased at 3 c/d (P<0.001), and the corneal HOAs increased in the 5-MM group (P=0.030). CONCLUSION: Ortho-k with 5 mm BOZD can control myopia progression more effectively. The mechanism may be associated with greater myopic shifts in RPR. |
| first_indexed | 2024-03-08T12:08:49Z |
| format | Article |
| id | doaj.art-8aaffe945743421892c470d87428e049 |
| institution | Directory Open Access Journal |
| issn | 2222-3959 2227-4898 |
| language | English |
| last_indexed | 2024-03-08T12:08:49Z |
| publishDate | 2024-02-01 |
| publisher | Press of International Journal of Ophthalmology (IJO PRESS) |
| record_format | Article |
| series | International Journal of Ophthalmology |
| spelling | doaj.art-8aaffe945743421892c470d87428e0492024-01-23T03:42:33ZengPress of International Journal of Ophthalmology (IJO PRESS)International Journal of Ophthalmology2222-39592227-48982024-02-0117232433010.18240/ijo.2024.02.1520240215One-year results for myopia control of orthokeratology with different back optic zone diameters: a randomized trial using a novel multispectral-based topographerWen-Ting Tang0Xiang-Ning Luo1Wen-Jing Zhao2Jia Liao3Xin-Yue Xu4Hui-Dan Zhang5Li Zhang6Wen-Ting Tang. Department of Ophthalmology, the First Affiliated Hospital of Chengdu Medical College, Chengdu Medical College, No.278 Baoguang Road, Xindu District, Chengdu 610500, Sichuan Province, China. tangwenting1983@sina.comDepartment of Ophthalmology, the First Affiliated Hospital of Chengdu Medical College, Chengdu Medical College, Chengdu 610500, Sichuan Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Chengdu Medical College, Chengdu Medical College, Chengdu 610500, Sichuan Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Chengdu Medical College, Chengdu Medical College, Chengdu 610500, Sichuan Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Chengdu Medical College, Chengdu Medical College, Chengdu 610500, Sichuan Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Chengdu Medical College, Chengdu Medical College, Chengdu 610500, Sichuan Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Chengdu Medical College, Chengdu Medical College, Chengdu 610500, Sichuan Province, ChinaAIM: To present the 1-year results of a prospective cohort study investigating the efficacy, potential mechanism, and safety of orthokeratology (ortho-k) with different back optic zone diameters (BOZD) for myopia control in children. METHODS: This randomized clinical study was performed between Dec. 2020 and Dec. 2021. Participants were randomly assigned to three groups wearing ortho-k: 5 mm BOZD (5-MM group), 5.5 mm BOZD (5.5-MM group), and 6 mm BOZD (6-MM group). The 1-year data were recorded, including axial length, relative peripheral refraction (RPR, measured by multispectral refractive topography, MRT), and visual quality. The contrast sensitivity (CS) was evaluated by CSV-1000 instrument with spatial frequencies of 3, 6, 12, and 18 cycles/degree (c/d); the corneal higher-order aberrations (HOAs) were measured by iTrace aberration analyzer. The one-way ANOVA was performed to assess the differences between the three groups. The correlation between the change in AL and RPR was calculated by Pearson's correlation coefficient. RESULTS: The 1-year results of 20, 21, and 21 subjects in the 5-MM, 5.5-MM, and 6-MM groups, respectively, were presented. There were no statistical differences in baseline age, sex, or ocular parameters between the three groups (all P>0.05). At the 1-year visit, the 5-MM group had lower axial elongation than the 6-MM group (0.07±0.09 vs 0.18±0.11 mm, P=0.001). The 5-MM group had more myopic total RPR (TRPR, P=0.014), with RPR in the 15°–30° (RPR 15–30, P=0.015), 30°–45° (RPR 30–45, P=0.011), temporal (RPR-T, P=0.008), and nasal area (RPR-N, P<0.001) than the 6-MM group. RPR 15–30 in the 5.5-MM group was more myopic than that in the 6-MM group (P=0.002), and RPR-N in the 5-MM group was more myopic than that in the 5.5-MM group (P<0.001). There were positive correlations between the axial elongation and the change in TRPR (r=0.756, P<0.001), RPR 15–30 (r=0.364, P=0.004), RPR 30–45 (r=0.306, P=0.016), and RPR-N (r=0.253, P=0.047). The CS decreased at 3 c/d (P<0.001), and the corneal HOAs increased in the 5-MM group (P=0.030). CONCLUSION: Ortho-k with 5 mm BOZD can control myopia progression more effectively. The mechanism may be associated with greater myopic shifts in RPR.http://ies.ijo.cn/en_publish/2024/2/20240215.pdfrelative peripheral refractionorthokeratologymyopiaback optic zone diameteraxial lengthmultispectral refractive topography |
| spellingShingle | Wen-Ting Tang Xiang-Ning Luo Wen-Jing Zhao Jia Liao Xin-Yue Xu Hui-Dan Zhang Li Zhang One-year results for myopia control of orthokeratology with different back optic zone diameters: a randomized trial using a novel multispectral-based topographer International Journal of Ophthalmology relative peripheral refraction orthokeratology myopia back optic zone diameter axial length multispectral refractive topography |
| title | One-year results for myopia control of orthokeratology with different back optic zone diameters: a randomized trial using a novel multispectral-based topographer |
| title_full | One-year results for myopia control of orthokeratology with different back optic zone diameters: a randomized trial using a novel multispectral-based topographer |
| title_fullStr | One-year results for myopia control of orthokeratology with different back optic zone diameters: a randomized trial using a novel multispectral-based topographer |
| title_full_unstemmed | One-year results for myopia control of orthokeratology with different back optic zone diameters: a randomized trial using a novel multispectral-based topographer |
| title_short | One-year results for myopia control of orthokeratology with different back optic zone diameters: a randomized trial using a novel multispectral-based topographer |
| title_sort | one year results for myopia control of orthokeratology with different back optic zone diameters a randomized trial using a novel multispectral based topographer |
| topic | relative peripheral refraction orthokeratology myopia back optic zone diameter axial length multispectral refractive topography |
| url | http://ies.ijo.cn/en_publish/2024/2/20240215.pdf |
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