Dual image corneal radius measurement

Details Dual image corneal radius measurement Dual image corneal radius measurement

1980-09-05

1983-03-01

Evans, F. L.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351221, A61B 310

Patent

active

043753205

ABSTRACT:
An instrument with a microscope brings into focus the cornea of a patient's eye for measurement of the radius of curvature of the cornea. Included is a pair of parallel spaced apart linear objects in a plane perpendicular to the optical axis of the eye and of the microscope. A square rod of refractile transparent material is mounted in the field of view of the microscope with a diagonal of the cross-section thereof common to the optical axis of the microscope. Structure is provided for rotating the rod around the optical axis of the microscope to produce a parallel line offset-overlap pattern of the objects as viewed through the rod. Structure is further provided for measuring the angle between a perpendicular from the long axes of the objects, and the orientation of the rod at which the pattern is produced.

REFERENCES:
patent: 4046463 (1977-09-01), La Russa et al.
patent: 4157859 (1979-06-01), Terry
patent: 4165744 (1979-08-01), Cravy et al.

Affiliated with

Also associated with

Rating

Dual image corneal radius measurement does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual image corneal radius measurement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual image corneal radius measurement will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1458718