The examiner sits facing the patient at a distance of one meter. The patient puts on the trial frame,

placing the center of the frame circle at the center of the pupil of the eye to be examined.

Cover the other eye with a black film, and let the patient's eyes look at the upper edge of

the flat mirror on the retinoscope. Then shoot the light source into the pupil area of the patient,

peek at the reflection of the patient’s pupil from behind the central small hole of the retinoscope,

and rotate the retinoscope slightly and slowly up, down or left and right, at this time red-yellow or light-yellow

reflections can be seen Move in the pupil area.