Automa refractor and keratometer (NSN 6540-01-472-4242)
Special Features
Sphere power: +16.75 to -19.00 diopters (step 0.25 diopters) cylinder power: 0.00 to -6.00 diopters; cylinder axis: 0 to 180 degrees (5 steps); can read the sphere, axis, and cylinder scales inthe dark setting of an exam room; speeds up an exam by allowing you to adjust axis and the cross cylinders at the same time
