The 82II's LED lamp eliminates troublesome lamp replacement and makes increases battery life 4-fold​​
Cornea reflection light coincidence is used which works by aligning luminous points on the pupils with the measuring line.
Results are displayed digitally with three measurements given - right, right + left, and left
Results are accurate to within 0.25 mm
Measurements can be made for a single eye or for both eyes.
Possible to measure PD of focusing-point distances ranging from 30cm to infinity
Automatically switches off one minute after operation is completed, thus conserving power
Distances from tops of cornea to lenses of frames can also be measured