| Reliability of Refractive Measurement by Hand-held Autorefractor. |
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Tae Yoon La, Jae Ryong Oh |
1Department of Ophthalmology, Kangnam St. Mary's Hospital, College of Medicine, The Catholic University of Korea. laty@catholic.ac.kr
2Department of Ophthalmology, Ilsan Paik Hospital,College of Medicine, Inje University, Koyang, Korea. |
| 휴대형 자동굴절검사기로 측정한 굴절력의 신뢰성 |
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나태윤 ( Tae Yoon La ) , 오재룡 ( Jae Ryong Oh ) |
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| Abstract |
PURPOSE
We tried to evaluate the reliablility of refractive measurement by hand-held autorefractor (HHAR). METHODS: Ninety patients (180 eyes) with simple refractive error were divided into three groups (30 patients each) according to their ages. Group I is under 6 years old; group II, from 7 to 15 years old; and group 3, over 16 years old. Under cycloplegics, three measuring methods of refraction using table top autorefractor (Model 599, Zeiss Humphrey, USA), hand-held autorefractor (Retinomax K-plus, Nikon, Japan) and skiascope (Heine beta 200, Germany) were performed and we compared each spherical and cylindrical value in 3 groups. RESULTS: There was no significant difference in both spherical and cylindrical value between HH-AR and skiascope in all groups (PI, sph=0.579, PI, cyl=0.708, PII, sph=0.801, PII , cyl=0.730, PIII , sph=0.816, PIII, cyl=0.754) . But there was significant difference in both spherical and cylindrical value between table top autorefractor and skiascope in group I (PI,sph=0.019, PI,cyl=0.030, PII,sph=0.405, PII,cyl=0.392, PIII,sph=0.876, PIII,cyl=0.747). CONCLUSIONS: We believe that hand-held autorefractor can be a useful instrument to measure refractive power without serious error, especially in patients who have difficulty with table top autorefractor. |
| Key Words:
Hand-held autorefractor;Table top autorefractor;Uncooperative patients |
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