- The “cornea reflection light coincidence method” is used. This operates by aligning luminous points on the pupils with the measuring line.
- Results are displayed digitally. Three measurements are given : Right, Right + Left, 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.

- Forehead Bar
- Nose Pad
- Display of PD (R・R + L・L) or Distance from Cornea Top to Lens
- Power Supply Switch
- PD/ Cornea-Lens Distance Change Button
- PD Adjustment Lever
- Focusing-Point Distance Lever
- Viewfinder
Method of measurement |
Cornea reflection light coincidence method |
Range of measurement |
46 to 82 mm (Total PD)
23 to 41 mm (Each eye)
Graduations 0.5 mm |
Display |
Liquid crystal digital display |
Target for focusing point |
Internal green dot on illuminated background |
Range of focusing point |
30 cm to ∞ |
Diopter changer |
Provided |
Eye shield |
Provided |
Illumination lamp |
LED |
Power supply |
6V DC (SUM3 batteries X 4) |
Dimensions |
155 (W) X 255 (D) X 55 (H) mm |
Weight |
690 g |
Standard accessories |
Dust cover |