Purpose: We evaluate accuracy of refraction measurement by RETKO ORK II.
Methods: There are no cataract, corneal opacity, and medium opacity visit to our haspital in simple myopia 40 eyes of 20 patients, we divided myopia of more than spherical equvalent 6.0D group1 and less than spherical equvalent 6.0D group2. Cycloplegic refraction measure 3 times using RETKO ORK II and Canon RK5 with a man of experience, we compared average and average of the absolute of spherical power, cyliderical power and cyliderical axis.
Results: In the group1, difference of spherical power is 0.07±0.41D, difference of cyliderical power is -0.39±0.63D, cyliderical axis show 3.38±10.60 difference however there was not satisfically significant difference. In the gropu2, difference of spherical power is 0.11±0.29D, difference of cyliderical power is -0.28±0.49D, cylidical axis show 0.19±9.28 difference however there was not satistically significant difference.
Conclusions: Spherical power, cyliderical power and cyliderical axis of RETKO ORK II and Canon RK5 was not satistically significant difference, accuracy and reproducibility of RETKO ORK II show decided superiority.
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