Pupil measuring pen

The utility model relates to the technical field of pupil measurement, in particular to a pupil measuring pen which comprises a pupil measuring pen body, a holding part and a limiting part. The holding part is arranged at the outer part of the rear side of the pupil measuring pen and is used for changing the holding mode of the pupil measuring pen; comprising holding rods arranged on the two sides of the pupil measuring pen, the holding rods can be turned over, and a connecting plate is arranged between the rear ends of the two holding rods; a holding part and a limiting part are arranged on the rear side of the pupil measuring pen, namely, the holding part is turned over to enable the holding part and the measuring pen to form a 90-degree angle, when pupil measurement is conducted on eyes of a patient, a medical worker can directly hold the two holding rods, and by means of the use mode, it is avoided that the medical worker observes the eyes of the patient due to the fact that the hand influences the medica