| 摘要 |
PROBLEM TO BE SOLVED: To efficiently conduct visual acuity tests while reducing the total number of tests in a group examination, etc. SOLUTION: This device includes a target presenting means for presenting visual targets individually for each visual acuity value, an input means for inputting the responses of a subject to the targets presented, a test means having a test program for automatically determining the visual acuity of the subject by determining whether or not the responses inputted by the input means match the targets presented and determining the visual acuity value of the next target to be presented, the program involving the step of varying the visual acuity value of the next target to be presented every N (2 or more) stages, and an execution means for executing the test program.
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