Repeated pupil size measurements in refractive surgery candidates

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• 作者：Christoph Robl ; Ieva Sliesoraityte ; Jost Hillenkamp ; Philipp Prahs ; Chris P. Lohmann ; Horst Helbig ; Wolfgang A. Herrmann
• 刊名：Journal of Cataract and Refractive Surgery
• 出版年：2009
• 出版时间：December 2009
• 年：2009
• 卷：35
• 期：12
• 页码：2099-2102
• 全文大小：149 K

文摘

Purpose

To evaluate the individual variation in pupil diameter measurements in refractive surgery candidates under standardized conditions over 2 testing sessions using a digital infrared pupillometer.

Setting

Department of Ophthalmology, University Medical Center Regensburg, Regensburg, Germany.

Methods

The pupil size in both eyes of consecutive refractive surgery candidates was measured under 2 illumination levels (scotopic at 0.03 lux, low mesopic at 0.82 lux) with a digital infrared pupillometer (Procyon P2000 SA). Before measurement, a standardized dark-adaptation protocol was used. Measurements were taken twice on separate occasions.

Results

The study evaluated 318 eyes of 159 patients with a mean age of 36.3 years ± 10.2 (SD). The mean interval between measurements was 53 ± 62.8 days. Despite sufficient power (β < 0.05), there was no statistically significant difference between 2 consecutive measurements under scotopic and low mesopic illumination.

Conclusion

Using a standardized dark-adaptation protocol, refractive surgery candidates showed no significant variation in scotopic or low mesopic pupil diameter over 2 testing sessions.