Pupil sizes from 1.5 to 10 mm in 0.5 mm increments are easily measured.
Can be used vertically or horizontally.
The reverse side has a mm scale for measurement of PD.
Ruler is printed on clear semi-rigid plastic.
Pupil sizes from 1.5 to 10 mm in 0.5 mm increments are easily measured.
Can be used vertically or horizontally.
The reverse side has a mm scale for measurement of PD.
Ruler is printed on clear semi-rigid plastic.