Pupilometer Optics Digital Partial Discharge Meter Pupil Distance Meter Pupil Distance Meter Optical Instrument(LY-9AT)

Product Description

【Pupillary distance meter】 PD meter is a precision optical instrument for measuring the pupillary distance in the process of optometry, with direct point taking and high positioning accuracy.
Simple and rapid measuring operation, and free operation of the direct PD adjustment lever are possible. Combining with the adjustable viewing distance selecting lever for measuring all kind of the viewing distances, the PD measurement is simple and precise.
【Energy saving design】Pupilometer pupil distance meter LED light design and low power consumption ensure the life of the internal circuit board. the brightness of the LED is adjustable. It can be compensated +2.0d according to the degree of vision.
【Automatic shutdown to save data】Automatic shutdown after 1 minute, or you can press a button to shutdown. It stays on and drains the battery. Store the device flat and it will turn off automatically. It retains the reading on the screen as long as the slide control has not been moved, and even in memory when it is turned back on
【Effective measurement range】Binocular measurement: 50 to 80 mm; Monocular measurement: 25 to 40 mm (resolution: 0.5 mm)