Changes and Diurnal Variation of Visual Quality after Orthokeratology in Myopic Children
Purpose. To assess the changes and the diurnal variation of visual quality after orthokeratology in myopic children. Methods. Forty-four eyes of 22 subjects with a mean age of 10.55 ± 1.53 years (8 to 14 years) were enrolled in this prospective study. Their spherical equivalent ranged from −1.25 to...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Journal of Ophthalmology |
| Online Access: | http://dx.doi.org/10.1155/2018/3174826 |
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| author | Hao-Chen Guo Wan-Qing Jin An-Peng Pan Qin-Mei Wang Jia Qu A-Yong Yu |
| author_facet | Hao-Chen Guo Wan-Qing Jin An-Peng Pan Qin-Mei Wang Jia Qu A-Yong Yu |
| author_sort | Hao-Chen Guo |
| collection | DOAJ |
| description | Purpose. To assess the changes and the diurnal variation of visual quality after orthokeratology in myopic children. Methods. Forty-four eyes of 22 subjects with a mean age of 10.55 ± 1.53 years (8 to 14 years) were enrolled in this prospective study. Their spherical equivalent ranged from −1.25 to −4.25 diopters (D) and astigmatism was less than 1.00 D. Parameters including corneal curvature, ocular objective scatter index (OSI), the modulation transfer function (MTF), root mean square of ocular and corneal wavefront aberrations, and contrast sensitivity function (CSF) were measured before and at two time points during the same day after 1 month of orthokeratology. Results. After orthokeratology, uncorrected visual acuity (UCVA) and spherical equivalent were significantly improved from baseline (P<0.001), and their diurnal variation was not significant (P=0.083,0.568). OSI increased from 0.29 ± 0.15 to 0.65 ± 0.31 (P<0.001). MTF decreased significantly (P<0.01). Corneal curvature and ocular total aberration decreased (P<0.001), while the ocular and corneal higher-order aberration increased significantly (P<0.01). The CSF under photopic condition decreased at 3 cpd (P=0.006) and increased at 18 cpd (P=0.012). The diurnal variation of CSF at 18 cpd under mesopic and high glare conditions and at 12 cpd under photopic condition was significant (P=0.002,0.01,0.017). Conclusions. Orthokeratology can effectively improve UCVA and high spatial frequency CSF by decreasing the low-order aberrations. However, MTF and CSF at low spatial frequency decreased because of the increase of intraocular scattering and high-order aberrations. Meanwhile, CSF at high spatial frequency fluctuates significantly at two times during the same day after 1 month orthokeratology. |
| format | Article |
| id | doaj-art-272601962d224637823fc9557925bc8a |
| institution | Kabale University |
| issn | 2090-004X 2090-0058 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Ophthalmology |
| spelling | doaj-art-272601962d224637823fc9557925bc8a2025-02-03T01:30:18ZengWileyJournal of Ophthalmology2090-004X2090-00582018-01-01201810.1155/2018/31748263174826Changes and Diurnal Variation of Visual Quality after Orthokeratology in Myopic ChildrenHao-Chen Guo0Wan-Qing Jin1An-Peng Pan2Qin-Mei Wang3Jia Qu4A-Yong Yu5The Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, ChinaThe Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, ChinaThe Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, ChinaThe Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, ChinaThe Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, ChinaThe Eye Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, ChinaPurpose. To assess the changes and the diurnal variation of visual quality after orthokeratology in myopic children. Methods. Forty-four eyes of 22 subjects with a mean age of 10.55 ± 1.53 years (8 to 14 years) were enrolled in this prospective study. Their spherical equivalent ranged from −1.25 to −4.25 diopters (D) and astigmatism was less than 1.00 D. Parameters including corneal curvature, ocular objective scatter index (OSI), the modulation transfer function (MTF), root mean square of ocular and corneal wavefront aberrations, and contrast sensitivity function (CSF) were measured before and at two time points during the same day after 1 month of orthokeratology. Results. After orthokeratology, uncorrected visual acuity (UCVA) and spherical equivalent were significantly improved from baseline (P<0.001), and their diurnal variation was not significant (P=0.083,0.568). OSI increased from 0.29 ± 0.15 to 0.65 ± 0.31 (P<0.001). MTF decreased significantly (P<0.01). Corneal curvature and ocular total aberration decreased (P<0.001), while the ocular and corneal higher-order aberration increased significantly (P<0.01). The CSF under photopic condition decreased at 3 cpd (P=0.006) and increased at 18 cpd (P=0.012). The diurnal variation of CSF at 18 cpd under mesopic and high glare conditions and at 12 cpd under photopic condition was significant (P=0.002,0.01,0.017). Conclusions. Orthokeratology can effectively improve UCVA and high spatial frequency CSF by decreasing the low-order aberrations. However, MTF and CSF at low spatial frequency decreased because of the increase of intraocular scattering and high-order aberrations. Meanwhile, CSF at high spatial frequency fluctuates significantly at two times during the same day after 1 month orthokeratology.http://dx.doi.org/10.1155/2018/3174826 |
| spellingShingle | Hao-Chen Guo Wan-Qing Jin An-Peng Pan Qin-Mei Wang Jia Qu A-Yong Yu Changes and Diurnal Variation of Visual Quality after Orthokeratology in Myopic Children Journal of Ophthalmology |
| title | Changes and Diurnal Variation of Visual Quality after Orthokeratology in Myopic Children |
| title_full | Changes and Diurnal Variation of Visual Quality after Orthokeratology in Myopic Children |
| title_fullStr | Changes and Diurnal Variation of Visual Quality after Orthokeratology in Myopic Children |
| title_full_unstemmed | Changes and Diurnal Variation of Visual Quality after Orthokeratology in Myopic Children |
| title_short | Changes and Diurnal Variation of Visual Quality after Orthokeratology in Myopic Children |
| title_sort | changes and diurnal variation of visual quality after orthokeratology in myopic children |
| url | http://dx.doi.org/10.1155/2018/3174826 |
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