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KMID : 1011420160210040417
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Journal of Korean Ophthalmic Optics Society
2016 Volume.21 No. 4 p.417 ~ p.422
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Comparison between Prism Dissociation Method and MKH in Prism Prescription for Exophoria
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Shin Eun-Hee
Kim Dae-Hyun
Hong Sung-Il
Park Sang-Hee
Son Jeong-Sik
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Abstract
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Purpose: The purpose of this study was to compare the prism dissociation method and MKH for the exophoria prism prescription.
Methods: This study carried out 51 subjects with exophoria (30 male, 21 female) who did not have any other eye diseases and had over 0.9 correction visual acuity. We investigated that the difference of prism prescription value calculated by Sheard criterion and by MKH for subjects who performed this experiments. Also we researched the satisfaction of subjects - satisfaction for a test duration, a prism prescription and understanding of a test process - by using a questionnaire.
Results: For 51 subjects, the mean of phoria measured by prism dissociation method was 4.41±3.60 Δ. And for 24 subjects who were needed prism prescription, the mean of prism prescription value was 1.96±1.80 Δ according to Sheard criterion, 1.69±1.15 Δ according to MKH respectively. There was no statistically significant difference between both prescriptions (p=0.345). But survey results indicated that subject satisfaction for MKH was higher than a prism dissociation method. The difference of subject satisfaction for two types of test was significant (p=0.000~0.001).
Conclusions: Considering that MKH rated higher than prism dissociation method in satisfaction, these findings suggested that exophoria prescription by MKH would be useful for actual clinical field.
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KEYWORD
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Exophoria, Prism dissociation method, Pola test, Sheard criterion prism prescription, MKH prescription
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