Measuring refractive characteristics of human eyes

Details Measuring refractive characteristics of human eyes Measuring refractive characteristics of human eyes

2008-05-13

2008-05-13

Hasan, M. (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S203000

Reexamination Certificate

active

10485323

ABSTRACT:
An apparatus and method for measuring refractive characteristics of human eyes with an objective refraction measuring device for measuring refraction in at least one eye, the objective refraction measuring system having a proximal end and a distal end, the objective refraction measuring system suitable for looking in the proximal end and seeing out the distal end; an open field visual target. An open viewing lane is provided between the eye and the open field visual target, the viewing lane has sufficient length to allow for focusing the eye at infinity and for natural accommodation at true distance targets, such near distances such as reading distances. The objective refraction measuring device can be positioned in the viewing lane to measure the eye while the eye is focused on the open field visual target.

REFERENCES:
patent: 3791719 (1974-02-01), Kratzer et al.
patent: 3883233 (1975-05-01), Guilino
patent: 4190332 (1980-02-01), Body et al.
patent: 4408846 (1983-10-01), Balliet
patent: 4778268 (1988-10-01), Randle
patent: 6070981 (2000-06-01), Mihashi et al.

Affiliated with

Also associated with

Rating

Measuring refractive characteristics of human eyes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Measuring refractive characteristics of human eyes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measuring refractive characteristics of human eyes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3924537