Apparatus for detecting astigmatic axes and measuring refractive

Details Apparatus for detecting astigmatic axes and measuring refractive Apparatus for detecting astigmatic axes and measuring refractive

1978-11-13

1981-10-06

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 14, A61B 310

Patent

active

042931991

ABSTRACT:
An apparatus for detecting astigmatic axes and measuring refractive powers such as the lens of a human eye. A disc has a first group of slits oriented in one direction and a second group of slits oriented perpendicular thereto. Each slit has a deflecting means with a direction of deflection perpendicular to the lengthwise direction of its slits for measuring the refractive power. The apparatus also has astigmatic axis detecting target means which can be used immediately prior to the refraction so that the refraction on each astigmatic axis can be measured before conditions change in the eye.

REFERENCES:
patent: 1613658 (1927-01-01), Henker
patent: 3785723 (1974-01-01), Guyton
patent: 4021102 (1977-05-01), Iizuka
patent: 4125320 (1978-11-01), Rassow et al.

Affiliated with

Also associated with

Rating

Apparatus for detecting astigmatic axes and measuring refractive does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for detecting astigmatic axes and measuring refractive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for detecting astigmatic axes and measuring refractive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1203691