PURPOSE: To presenting a cornea measuring value by compounding with other eye measuring or a photographing mechanism and uniting a result by executing the arithmetic processing of the position relation information of a mark, which is overlapped and projected to the cornea ring part of a front eye part picture on a video means, which projects the front eye part picture of an eye to be checked, and presenting an operated result to include a cornea diameter to the result.
CONSTITUTION: An interval (d) between marks M1 and M2 is changed according to the prescribed step interval each time a measuring switch 21 is pushed. Then, the interval is determined by the selection of a mark interval increase and decrease changeover switch 8. A front eye part picture and the marks M1 and M2 are overlapped and projected and when the marks M1 and M2 are coincident to a corner ring part, an operation and print commanding switch 9 is pushed. Thus, a mark interval computing element 26 is operated and a cornea diameter dimension is calculated on the eye surface of an eye E to be checked with considering the optical condition of front eye part photograph or the electric condition of display. The result can be printed out to a recording paper 6a of a printer 6, displayed on a presenting part 10 or projecting on one part of a television monitor 4 through a video signal synthesizing circuit 23.
MAEDA YASUO
YANO KOICHI
NAKAMURA YUKITSUGU
MASUDA TAKASHI
