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United States Patent [«]
[li] Patent Number:  Date of Patent:
 APPARATUS AND METHOD FOR CORNEA MARKING
 Inventor: Andrew Davis, Matawan, N.J.
 Assignee: Mount Sinai School of Medicine of the City University of New York, New York, N.Y.
 Appl. No.: 361,240
 Filed: Jun. 5, 1989
 Int. CI.' A61D1/00
 U.S. CI 606/166; 128/898;
 Field of Search 606/166, 172; 351/206,
 References Cited
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Primary Examiner—Robert Hafer
Assistant Examiner—Kerry Owens
Attorney, Agent, or Firm—Brumbaugh, Graves,
Donohue & Raymond
An apparatus for maintaining a patient's visual fixation and centration while marking the patient's cornea comprises a housing, a light source axially aligned and integral to the housing to maintain the patient's visual fixation and centration while the cornea is marked with the light source acting as a point source of light and enabling the patient to see a shadow image of the patient's pupil, and means for marking the cornea which are integral to the housing and positioned such that the light source and means for marking are axially aligned. A method for maintaining a patient's visual fixation and centration while marking the cornea employs the apparatus in such a manner that the patient looks directly at the center of the image emanating from the illuminated light source, which is a shadow image of the patient's pupil, and the means for marking are then employed to place a mark on the patient's cornea. The apparatus and method are advantageous in that they provide a simple and effective means of accurately marking the cornea prior to corneal surgery.
20 Claims, 4 Drawing Sheets