IN A previous article1 comparative data on the results of examination of night vision of 217 Caucasian and 217 Japanese students were reported. The purpose of the present paper is to furnish statistical data on the correlation that was found between the instruments used, to describe briefly some of the other instruments and technics employed in night vision testing and to proffer a plan, based on physiologic and optical principles, for universal adoption for the complete examination of the function of night vision.
COMPARISON OF FIVE INSTRUMENTS
The instruments used in the previous survey included the Hecht-Shlaer adaptometer, the S.A.M. Night Vision Tester, the Luckiesh-Moss Low Contrast Test Chart, the Harman Disc Spotting Device and the Ferree-Rand Projectochart. Of the results obtained with these instruments, the figures obtained on the Hecht-Shlaer adaptometer, for the examination of the light threshold, and the scores achieved on the S.A.M. Night Vision Tester
WILLIAM JOHN HOLMES. NIGHT VISIONII. A Comparison and Critique of Various Procedures Used for Night Vision Testing. Arch Ophthalmol. 1946;36(3):302–314. doi:10.1001/archopht.1946.00890210309004