The objectives were to examine the difference in and relevance of the sphere, cylinder, cylindrical axis, and SE values between the left and right eyes. Methods/Statistical analysis: The refraction function of KR-9000PW was used to measure the refractive errors of 382 eyes of 191 subjects. For the refractive errors measured, the distribution of the absolute differences between the LandR eyes was analyzed. In addition, correlation analyses were performed to find out the relevance of values between the LandR eyes. Findings: There were no significant differences in the mean values of the sphere, cylinder, cylindrical axis, and SE between the LandR eyes. Looking at the distribution of absolute difference of the refractive errors in the LandR eyes, over 50% of the subjects showed a difference smaller than 0.5D for the sphere, cylinder and SE. Over 80% of the subjects showed a difference smaller than 1D. On the contrary, a difference of 2D or larger was shown in 3.66% of the subjects for the sphere, 1.05% for the cylinder and 3.14% for the SE. The difference in the cylindrical axis was smaller than 20� in 66.05% of the subjects and between 70� and 90� in 8.09%. Also, all refractive errors analyzed showed a high correlation between the LandR eyes. Improvements/Applications: The results on the distribution and relevance of absolute difference of the refractive errors in the LandR eyes can be utilized as basic data for research on binocular vision including anisometropia.
CITATION STYLE
Lee, S. D. (2019). Comparison of the Sphere, Cylinder, Spherical Equivalent and Cylindrical Axis Between the Left and Right Eyes. International Journal of Innovative Technology and Exploring Engineering, 8(8), 758–760.
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