Description:
Excellent portable lensometer ideal for limited spaces, mobile evaluations and ophthalmic screenings.  A valuable tool in areas where there is no electricity.
 
 
SPECIFICATIONS
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Vertex Power Range: +15 diopter to -15 diopter
Vertex Power Steps: 0.125D steps from 0 to (±)10D 
                                   0.25D steps from (±)10D to (±)15D
Prismatic Power Range: 4 prism diopters
Prismatic Power Steps: 1 diopter
Cylindrical Axis Range: 0 to 180 degrees
Cylindrical Axis Steps: 5 degrees
Lenses Accommodated: 20mm to 80mm Diameters
Focusing Eyepiece: -5D to +5D
Bulb: 6V/3W
Power: 2 AA Batteries or standard electrical outlet 
Operation Manual included