Digital pd meter Optical pupilometer LED light One battery powered

Description

Main features:
Cornea reflection light coincidence method is used.
This operates by aligning luminous points on the pupils with the measuring line.
Results are displayed digitally in LCD window: Right, PD, Left.
Steps: 0.5mm.
Automatic power shut-off in one minute.
Specifications:
Range of measurement: 45-82mm(Total) in 0.5mm steps, 22.5-41mm(Each) in 0.5mm steps
Display: Liquid crystal digital display
Fixation target: Green dot on illuminated background
Focusing distance: 30cm,40cm,50cm,100cm,200cm,infinity
Illumination: LED
Automatical shut-off: after one minute of inactivity
Power supply:
1.5V DC, 1x AA battery