Wyzinski P, O'Dell L W
Ophthalmology. 1987 Feb;94(2):120-4. doi: 10.1016/s0161-6420(87)33488-8.
A single patient was refracted 1000 times at all hours of the day in the year after bilateral radial keratotomy (RK). Preoperatively, there was practically no diurnal variation of refraction. Postoperatively, the refraction showed a myopic shift of several diopters from early morning to late evening. Transient hyperopia was superimposed on this diurnal cycle of refraction, peaking two weeks postoperatively, and a smaller long-term hyperopic shift was evident 1 year postoperatively.
一名患者在接受双侧放射状角膜切开术（RK）后的一年中，于一天中的所有时间进行了1000次验光。术前，屈光几乎没有昼夜变化。术后，从清晨到傍晚，屈光显示出几个屈光度的近视偏移。短暂性远视叠加在这种屈光的昼夜周期上，在术后两周达到峰值，术后1年出现较小的长期远视偏移。
