Effect of overnight orthokeratology on corneal topography and tears
AIM: To study the effect of wearing overnight orthokeratology(OK)contact lens on corneal topography and tears in adolescents.<p>METHODS: The diopter, corneal curvature, corneal surface regularity index(SRI), tear break-up time(BUT), Schirmer I test, and corneal fluorescent(FL)were recordedon 4...
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doaj-dd5a5fd55d434a55b815ff0ebc4a7ca72020-11-24T22:46:41ZengPress of International Journal of Ophthalmology (IJO PRESS)Guoji Yanke Zazhi1672-51231672-51232015-02-0115220520710.3980/j.issn.1672-5123.2015.2.05Effect of overnight orthokeratology on corneal topography and tearsJian Li0Ping Dong1Cheng-Xin Wang2Hu Liu3Department of Ophthalmology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, ChinaDepartment of Ophthalmology, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, ChinaAIM: To study the effect of wearing overnight orthokeratology(OK)contact lens on corneal topography and tears in adolescents.<p>METHODS: The diopter, corneal curvature, corneal surface regularity index(SRI), tear break-up time(BUT), Schirmer I test, and corneal fluorescent(FL)were recordedon 40(80 eyes)adolescent myopia patients(mean age 13.68±2.32 years), who had worn OK contact lensfor more than 1 year, with mean spherical equivalent refraction -3.61±1.48D before wearing OK contact lens. These indexes were tested and recorded before the patients' wearing OK contact lens and 5 times(1wk and 1, 3, 6, 12mo after the first wearing)during the patients' overnight wearing OK contact lens for 8~10 hours per day. <p>RESULTS: Compared with pre-wearing, at post-wearing OK contact lens 12mo, the mean spherical equivalent refraction was apparently decreased from -3.61±1.48D to -1.39±1.31D(<i>P</i><0.01). The corneal curvature was significantly flattened from 42.29±1.55D to 40.13±1.41D(<i>P</i><0.01). Mean SRI was increased from 0.34±0.01 to 0.37±0.01(<i>P</i><0.01). Mean BUT was decreased from 10.39±2.25s to 7.26±1.77s(<i>P</i><0.01). These indexes were stable at 1wk after wearing OK contact lens overnight and had no significant differences during the following(1, 3, 6, 12mo after wearing)tests(<i>P</i>>0.05). There were no significant differences on Schirmer Ⅰ test during the 12mo of OK wearing(<i>P></i>0.05). The cases of corneal fluorescent staining increased were mainly grade I, and the number of corneal staining grade I at 1 wk and 1, 3, 6, 12 mo after wearing were 15 eyes(18.8%), 9 eyes(11.3%),13 eyes(16.3%), 9 eyes(11.3%), and 12 eyes(15.0%). BUT of corneal staining grade I wasdecreased significantly, compared with the BUT of corneal staining grade 0 during the 12mo of OK wearing(<i>P</i><0.05).<p>CONCLUSION: OK contact lens can significantly decrease the degree of myopia and <i>K</i> value of corneal curvature without changing tear volume. However, tear film stability weakens, which needs regular follow-up.http://ies.ijo.cn/cn_publish/2015/2/201502005.pdforthokeratology contact lenscorneal topographytears |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jian Li Ping Dong Cheng-Xin Wang Hu Liu |
spellingShingle |
Jian Li Ping Dong Cheng-Xin Wang Hu Liu Effect of overnight orthokeratology on corneal topography and tears Guoji Yanke Zazhi orthokeratology contact lens corneal topography tears |
author_facet |
Jian Li Ping Dong Cheng-Xin Wang Hu Liu |
author_sort |
Jian Li |
title |
Effect of overnight orthokeratology on corneal topography and tears |
title_short |
Effect of overnight orthokeratology on corneal topography and tears |
title_full |
Effect of overnight orthokeratology on corneal topography and tears |
title_fullStr |
Effect of overnight orthokeratology on corneal topography and tears |
title_full_unstemmed |
Effect of overnight orthokeratology on corneal topography and tears |
title_sort |
effect of overnight orthokeratology on corneal topography and tears |
publisher |
Press of International Journal of Ophthalmology (IJO PRESS) |
series |
Guoji Yanke Zazhi |
issn |
1672-5123 1672-5123 |
publishDate |
2015-02-01 |
description |
AIM: To study the effect of wearing overnight orthokeratology(OK)contact lens on corneal topography and tears in adolescents.<p>METHODS: The diopter, corneal curvature, corneal surface regularity index(SRI), tear break-up time(BUT), Schirmer I test, and corneal fluorescent(FL)were recordedon 40(80 eyes)adolescent myopia patients(mean age 13.68±2.32 years), who had worn OK contact lensfor more than 1 year, with mean spherical equivalent refraction -3.61±1.48D before wearing OK contact lens. These indexes were tested and recorded before the patients' wearing OK contact lens and 5 times(1wk and 1, 3, 6, 12mo after the first wearing)during the patients' overnight wearing OK contact lens for 8~10 hours per day. <p>RESULTS: Compared with pre-wearing, at post-wearing OK contact lens 12mo, the mean spherical equivalent refraction was apparently decreased from -3.61±1.48D to -1.39±1.31D(<i>P</i><0.01). The corneal curvature was significantly flattened from 42.29±1.55D to 40.13±1.41D(<i>P</i><0.01). Mean SRI was increased from 0.34±0.01 to 0.37±0.01(<i>P</i><0.01). Mean BUT was decreased from 10.39±2.25s to 7.26±1.77s(<i>P</i><0.01). These indexes were stable at 1wk after wearing OK contact lens overnight and had no significant differences during the following(1, 3, 6, 12mo after wearing)tests(<i>P</i>>0.05). There were no significant differences on Schirmer Ⅰ test during the 12mo of OK wearing(<i>P></i>0.05). The cases of corneal fluorescent staining increased were mainly grade I, and the number of corneal staining grade I at 1 wk and 1, 3, 6, 12 mo after wearing were 15 eyes(18.8%), 9 eyes(11.3%),13 eyes(16.3%), 9 eyes(11.3%), and 12 eyes(15.0%). BUT of corneal staining grade I wasdecreased significantly, compared with the BUT of corneal staining grade 0 during the 12mo of OK wearing(<i>P</i><0.05).<p>CONCLUSION: OK contact lens can significantly decrease the degree of myopia and <i>K</i> value of corneal curvature without changing tear volume. However, tear film stability weakens, which needs regular follow-up. |
topic |
orthokeratology contact lens corneal topography tears |
url |
http://ies.ijo.cn/cn_publish/2015/2/201502005.pdf |
work_keys_str_mv |
AT jianli effectofovernightorthokeratologyoncornealtopographyandtears AT pingdong effectofovernightorthokeratologyoncornealtopographyandtears AT chengxinwang effectofovernightorthokeratologyoncornealtopographyandtears AT huliu effectofovernightorthokeratologyoncornealtopographyandtears |
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