Daily change in refraction of the eye detected by automated-refractometers

ABSTRACT

To detect any change in automated refraction of the eyes between day and night times, 60 patients were evaluated using NIDEK-AR 1100 twice daily with not less than nine hours in between. In addition, 12 patients were autorefracted by the same apparatus before and after cycloplegia. Definite changes were found between day and night measurements in the spherical error [66.1%], in the astigmatic power [67.8%], and most prominent in the axis of astigmatism [83.33%]. It is necessity before final prescription of a glass after an automated refractometry is to re-adjust the readings obtained according to the patient's requirements by the trial set and test type