Ms. Qi Li Profile

Qi Li

Student at Shanghai Jiaotong Univ

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Proceedings Article | 18 January 2005 Paper

Correlation among auto-refractor, wavefront aberration, and subjective manual refraction

Qi Li, Qiushi Ren

Proceedings Volume 5630, (2005) https://doi.org/10.1117/12.575900

KEYWORDS: Refraction, Optical spheres, Wavefronts, Wavefront aberrations, Autoregressive models, Refractor telescopes, Monochromatic aberrations, Eye, Statistical analysis, Eyeglasses

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Three optometry methods which include auto-refractor, wavefront aberrometer and subjective manual refraction were studied and compared in measuring low order aberrations of 60 people’s 117 normal eyes. Paired t-test and linear regression were used to study these three methods’ relationship when measuring myopia with astigmatism. In order to make the analysis more clear, we divided the 117 normal eyes into different groups according to their subjective manual refraction and redid the statistical analysis. Correlations among three methods show significant in sphere, cylinder and axis in all groups, with sphere’s correlation coefficients largest(R>0.98, P<0.01) and cylinder’s smallest (0.900.01). Auto-refractor had significant change from the other two methods when measuring cylinder (P<0.01). The results after grouping differed a little from the analysis among total people. Although three methods showed significant change from each other in certain parameters, the amplitude of these differences were not large, which indicated that the coherence of auto-refractor, wavefront aberrometer and subjective refraction is good. However, we suggested that wavefront aberration measurement could be a good starting point of optometry, subjective refraction is still necessary for refinement.

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