Feature

●Our PD measuring instrument is a precision optical equipment with digital LCD display used to measure the distance between the human pupil and attach glasses when refracting. It has a function to measure the distance between one eye and two eyelids and can be used for single eye measurement. It can be used for single eye measurement left and right eye and the measurements are displayed separately
●Effective measurement range: Binocular measurements: 50-80mm; Monocular measurements: 25-40mm (Resolution: 0.5mm)
●Monocular measuring: Can be used to measure left and right eyes, and measurements are displayed separately
●Energy saving: In order to avoid power consumption caused by forgetting the shutdown, the switch will automatically turn off within about 1 minute after the operation is completed
●For transportation reasons, batteries are not included


Description

Using high precision linear sensor, advanced intelligent electronic system, digital display, the test results are more intuitive, clear and accurate.
Sophisticated optical equipment used to measure the distance between the human pupils during inspection to wear glasses.

Student distance:
Interpupillary distance and monocular distance
PD for Binoculars: Distance from the center of the pupil of the eye.
Monocular PD:Distance from the center of the left or right pupil to the middle of the nose.
Monocular and diagonal eyes, especially those who need progressive polyfocal lenses, should measure the pupillary distance of one eye.

Long VS Close Distance
Long distance PD:Distance between the pupil center of the two eyes in infinity
Proximity PD (NCD): The distance between pupil centers when you see nearby targets, i.e. when reading or working at a close distance of 30-40cm.

Myopillal distance is always smaller than the distance between the pupil

List: 1 x PD meter