Parallax-free optical zone marker

Details Parallax-free optical zone marker Parallax-free optical zone marker

1986-09-02

1987-11-10

Truluck, Dalton L.

Surgery

Truss

Pad

128316, 33670, A61F 900

Patent

active

047050357

ABSTRACT:
A parallax-free optical zone marker for use in radial karatotomy cornea surgery for impressing a temporary circular indentation into the cornea, the circular indentation to be used as a reference for radial incisions therefrom. The marker, integrally molded, includes an elongated handle and a collar portion disposed at one end of the handle. The lower end margin of the collar is preferrably circular an adapted to impress the circular indentation into the cornea with normal hand pressure applied through the handle. A passageway extends through the collar from its upper end margin to its lower end margin. Disposed within the passageway are a pair of crossplanes intersecting, preferably at ninety degrees one to another, along the longitudinal axis of the passageway, which axis intersects the center of the circular lower end margin. These crossplanes extend along substantially the entire length of the passageway but not to the lower end margin of the collar so as to prevent contact of the crossplanes with the cornea. The intersection of the crossplanes provides the user with viewable alignment means for assisting in the accurate orientation of the circular indentation. These crossplanes preferably taper in thickness toward their intersection for enhanced accuracy in the placement of the circular indentation. The marker is molded preferably of plastic in a wide range of sizes and may also be molded of clear or translucent material to increase light availability to the cornea as the circular indentation is made.

REFERENCES:
patent: 975410 (1910-11-01), Fullmer et al.
patent: 3482324 (1969-12-01), Samhat
patent: 4357941 (1982-11-01), Golubkov et al.
patent: 4417579 (1983-11-01), Soloviev et al.
patent: 4520815 (1985-06-01), Marinoff

Affiliated with

Also associated with

Rating

Parallax-free optical zone marker does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Parallax-free optical zone marker, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Parallax-free optical zone marker will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1061387