| Evaluation of Objective Accommodation Power in Different Age Groups Using an Auto Accommodation Refractometer. |
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Dong Wan Kang, Young Sub Eom, Jay Won Rhim, Su Yeon Kang, Hyo Myung Kim, Jong Suk Song |
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Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea. crisim@korea.ac.kr |
| 자동굴절검사기를 이용한 연령에 따른 객관적 조절력 평가 |
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강동완⋅엄영섭⋅임재원⋅강수연⋅김효명⋅송종석 |
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고려대학교 의과대학 안과학교실 |
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| Abstract |
PURPOSE
To evaluate the objective amplitude of accommodation in various age groups using an autorefractometer and to compare the results with subjective assessments on accommodation. Objective accommodative amplitude of artificial lenses in post-operative cataract patients was also measured. METHODS: In this study, 41 patients who visited Korea University Guro Hospital from July through August 2014 were categorized into 6 different age groups. Accommodative amplitude was measured using long-distance refraction at 5 m and short-distance refraction at 20 cm. In 20 patients, subjective amplitude of accommodation was measured using the minus lens technique and was compared with the measured objective accommodative amplitude. Accommodative amplitude was also measured in 8 patients who received cataract surgery. RESULTS: The mean accommodative ability in normal people was 2.38 D. The age groups of 10-19, 20-29, 30-39, 40-49, 50-59, and over 60 years showed accommodative amplitudes of 3.31 +/- 0.99 D, 3.25 +/- 0.34 D, 3.78 +/- 0.68 D, 1.00 +/- 0.60 D, 0.22 +/- 0.23 D, 0.00 +/- 0.00 D, respectively. The results showed a rapid decrease in accommodative ability of patients older than 40 years and demonstrated a correlation between objective and subjective amplitude of accommodation (Pearson's correlation coefficient 0.838). There was a significant difference between objective and subjective accommodative amplitudes in artificial lenses (p = 0.015), with average objective and subjective measures of 0.10 +/- 0.23 D and 0.59 +/- 0.35 D, respectively. CONCLUSIONS: Measuring amplitude of accommodation using an autorefractometer can be useful in assessing results of presbyopia treatment. |
| Key Words:
Accommodation;Autorefractometer;Pseudoaccommodation |
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