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KMID : 1036620160040020001
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Journal of Korean Clinical Health Science
2016 Volume.4 No. 2 p.1 ~ p.0
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Comparison of the Refracting Power and Aberration according to the Measurement Change in Illumination and Area of the Pupils
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Kim Bong-Hwan
Han Sun-Hee
Park Byeong-Gyu
Hwang Hyeon-Ju
Bae Ye-Sol
Seo Jeong-Bin
Yeo Ye-Eun
Yoon Min-Jeong
Kim Hak-Jun
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Abstract
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Purpose. We compared with the refracting power and aberration according to the measurement change in illumination and the pupils area by using the auto refraction instruments.
Methods. In this study it were examined 64 eyes without eye disease, 21.4 (±2.54) age, 32 (male 10, female 22) patients. Experiments in general illumination using the auto refraction instruments (HRK-8000A, Huvitz, Korea) was measured in both eyes 3 times and after scotopic for 30 minutes in a dark room blocked the light was measured in the same way. Aberration were measured coma, spherical aberration, high and low order aberrations in a general illumination (3500 lux) and low illumination (5 lux) of the pupil area 3.96 mm and 5.96 mm.
Results. In the general illumination for measuring of the pupil area, the refractive power, coma, spherical aberration and low order aberration was no significant difference. In the low illumination, spherical aberration of the pupil area was 0.005 (±0.015) ㎛ in a 3.96mm, 0.014 (±0.020) ㎛ in a 5.96 mm and appeared a significant difference(p = 0.003). In general and low illumination on the results of comparing the measured values of the refractive power and aberration at the pupil area 3.96 mm, high order aberrations was 0.205(±0.145) ㎛ in general illumination, 0.132(±0.075) ㎛ in low illumination and appeared a significant differences(p = 0.001). High order aberrations at the pupil area 5.96 mm was 0.278(±0.244) ㎛ in general illumination, 0.150(±0.092) ㎛ in low illumination and appeared a significant differences(p = 0.000).
Conclusions. When the eye refractive power measured by the automatic refraction does not depend on the illumination conditions and size of the observation pupil area, it was found that aberrations are affected by the illumination and the observation pupil area. It was found that the eye examination chamber illumination to obtain accurate measurement produces better results to decrease than to increase.
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KEYWORD
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Aberration, Illumination, Pupil, Refracting power
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