Refractor cross-cylinder apparatus

Details Refractor cross-cylinder apparatus Refractor cross-cylinder apparatus

A - Human Necessities

61

B

88/121.5

A61B 3/02 (2006.01) A61B 3/036 (2006.01)

Patent

CA 1101253

AO-3171 AHS/gg REFRACTOR CROSS-CYLINDER APPARATUS Abstract of the Disclosure A pair of cylinder lenses have a combined power of zero when their cylinder axes are parallel and a small cross cylinder power when one lens is rotated until its axis is perpendicular to the cylinder axis of the other lens. Cross- cylinder lenses are used to determine the accuracy of the cylinder power and cylinder axis selected by the practitioner. By mounting one cylinder lens in a motor-driven ring-like lens mount having a member which engages another ring-like lens mount, a single motor can be used to drive both lenses; select between parallel cylinder axes and crossed cylinder axes; and rotate the crosses axis lenses as an assembly to the desired position.

316012

Affiliated with

Also associated with

Rating

Refractor cross-cylinder apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Refractor cross-cylinder apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Refractor cross-cylinder apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-210844