眼科診療用器具に就いて（其の2）—自動車運転手身体検査に於ける側面視力検査器，他

Instruments for Ophthalmic Diagnosis and Therapy No.2: Instrument for sidewards visual acuity test in the physical examination for automobile drivers

側面視力検査

目的

　被検者（運転手）が前方を見ながら，どの程度両側を見得るかを決定しようとするものである。

The purpose of this test is the determination of sidewards visual field of the driver who kept his sight straight. This instrument is the semicircle with 75cm diameter which has scales from the central line to both extremes.

The center of the instrument is cut down to V-form so that a subject may out .the bridge of his nose to it.