PROBLEM TO BE SOLVED: To measure operating vision more accurately and comfortably by using a computer.SOLUTION: In this method and an apparatus for measuring the practical visual acuity, an optotype mark is displayed (step 103). A subjects response to the optotype mark is received by an input device (step 104). A determination is made as to whether or not the response is correct when the current response of the subject is correct and the previous response or one of the previous response and the last-but-one response is incorrect, an optotype mark corresponding to the same visual acuity is determined to be presented when the result shows that previous response is correct or both the previous response and the last-but-one response are correct, an optotype mark corresponding to a visual acuity one-level higher is determined to be presented, while when the current response of the subject is incorrect, an optotype mark corresponding to a visual acuity one-level lower is determined to be presented (steps 105-112).COPYRIGHT: (C)2012,JPO&INPIT【課題】より正確かつ快適に実用視力を測定する。【解決手段】視標マークを表示し(ステップ103)、これに対する被測定者の応答を入力装置により受け付けて(ステップ104)、応答の正誤を判断して、被測定者の今回の応答が正しく、前回の応答が誤りであったあるいは前回と前々回のいずれかが誤りであったという結果があれば、同一の視力に対応する視標マークを提示し、前回の応答あるいは前回と前々回の応答が正しかったという結果があれば、一段階上の視力に対応する視標マークを提示し、被測定者の今回の応答が誤りであれば、一段階下の視力に対応する視標マークを提示することを決定する(ステップ105~112)ことを特徴とする実用視力の測定方法と測定装置。【選択図】図1
