K&R Pupilometer

Specifications:

Range of measurement: 50-80mm(Total) in 0.5mm steps

                                    25-40mm(Each) in 0.5mm steps

Display: Liquid crystal digital display

Fixation target: Green dot on illuminated background

Focus range: 30cm to infinity

Illumination: LED

Automatical shut-off: after one minute of inactivity

Power supply: 4.5V DC, 3 AAA batteries