Features:
1. Adopt “cornea reflection light coincidence method” .
2. Align luminous point on the pupils with measuring line.
3. Results will be displayed digitally, right, right+left, left. The measuring accuracy is within 0.25mm.
4. Measure mode can be single eye or both eyes.
5. Automatically power off when operation has been completed for one minutes.
6. Distances between top of the cornea and lenses or frames can also be measured.
Parameters:
1. Measuring Range: 48 to 77mm (both eyes), 24 to 38.5mm (each eye)
2. Graduations: 0.5mm
3. Range of focusing point: 30cm to infinity
4. Power: 4.5V DC (Lr03 batteries X3)