Effect of Vision Therapy on Accommodative Lag in Myopic Children: A Randomized Clinical Trial
| Autor: | Xiang Chen, Mitchell Scheiman, Na Li, Jingcheng Shi, Martin Ming-Leung Ma |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Male
genetic structures Vergence Vision therapy law.invention 03 medical and health sciences Ocular physiology 0302 clinical medicine Ocular Motility Disorders Randomized controlled trial law Myopia Medicine Humans Single-Blind Method Prospective Studies Prospective cohort study Child business.industry Follow up studies Accommodation Ocular Convergence Ocular eye diseases Ophthalmology 030221 ophthalmology & optometry Disease Progression Optometry Female sense organs Accommodative lag business Accommodation 030217 neurology & neurosurgery Follow-Up Studies |
| Zdroj: | Optometry and vision science : official publication of the American Academy of Optometry. 96(1) |
| ISSN: | 1538-9235 |
| Popis: | Accommodative dysfunction has been suggested to be related to the development and progression of myopia. Office-based accommodative/vergence therapy (OBAVT) improved accommodative facility in Chinese myopic children, but it is unclear if such improvement has a role in decreasing myopic progression.The purpose of this study was to compare the effects of OBAVT with home reinforcement and office-based placebo therapy (OBPT) as a treatment to improve accommodative functions (i.e., lag, amplitude, and facility) in myopic children with poor accommodative accuracy.This was a prospective, single-masked, randomized clinical trial. Thirty-four Chinese children 8 to 12 years old with myopia and at least 1 diopter of lag of accommodation measured by autorefraction were enrolled. The participants were randomly assigned to the OBAVT or OBPT group. The primary outcome measure was the change in the monocular lag of accommodation from the baseline visit to the 13-week visit measured by a Shin-Nippon open-field autorefractor. Secondary outcome measures were changes in accommodative amplitude and monocular accommodative facility.A total of 33 participants completed the study. After 12 weeks of treatment, there were significant improvements in the lag of accommodation in both the OBAVT and OBPT groups (OBAVT: -0.30 ± 0.29 diopters [P.001; Cohen's d effect size, 1.29]; OBPT: -0.24 ± 0.30 diopters [P = .005; Cohen's d effect size, 1.24]). There was no statistically significant difference between the improvements in the two groups (P = .50). There was statistically significant improvement in monocular accommodative facility only in the OBAVT group (OBAVT: 7.7 ± 4.7 cycles per minute [P.001; Cohen's d effect size, 2.20]; OBPT: 1.9 ± 4.4 cycles per minute [P = .072]). The change in the OBAVT group was statistically significantly larger than that in the OBPT group (P.001).Office-based accommodative/vergence therapy was no more effective than OBPT in reducing the lag of accommodation in children 8 to 12 years old with low to moderate myopia. It did improve accommodative facility in Chinese myopic children, but it is unclear if such an improvement has a role in decreasing myopic progression. |
| Databáze: | OpenAIRE |
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