| 摘要 |
A visual acuity test mark displaying device comprises: a test mark selecting means provided with a plurality of test mark selecting keys which are operated for the sequential selection of visual acuity test marks; a display means for displaying visual acuity test marks selected by the test mark selecting means at a predetermined position; a specifying means for specifying optional key-mark combinations each of a test mark selecting key and a visual acuity test mark selected by operating the same test mark selecting key; an input means for entering data representing the arrangement of the visual acuity test marks specified by the specifying means; and a storage means for storing the optional key-mark combinations specified by the specifying means. The visual acuity test mark displaying device can be set for visual acuity test mark sets desired by the user and enables the change of the visual acuity test mark sets for which the same is set beforehand.
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