| 摘要 |
PROBLEM TO BE SOLVED: To reduce the non-uniformity of incision, to prevent the incorrect astigmatism of a cornea after an operation, to reduce the generation rate of the faults of a glare or the like and to shorten operation time by turning a main body to an elliptic shape and crossing the line of the minor axis direction of an ellipse with a position shifted from the center point of the line of the major direction of the ellipse. SOLUTION: For this optical zone marker 10, an annular or cylindrical metallic main body 12 is turned to the elliptic shape. Also, a relatively long metal wire 14 in a horizontal direction fixed to the main body 12 across the annular or cylindrical space of the main body 12 is arranged so as to verticallly and equally bisects the space of the elliptic shape and the relatively short metal wire 16 in a vertical direction is arranged perpendicularly to the metal wire 14, shifted to one side from the center line 18 for horizontally bisecting the space of the elliptic shape and arranged. Then, a distance X1 between an intersection 20 where the metal wire 14 in the horizontal direction and the metal wire 16 in the vertical direction are crossed and an imaginary point 22 where the metal wire 14 in the horizontal direction and the center line 18 are crossed is appropriately set corresponding to the size of the main body 12. |
