To provide an apparatus and method capable of appropriately examining sensitivity for each color to respective areas of a view field in the examination of a visual function of a subject.SOLUTION: A target 5 for examining a subject's visual function relating to color is displayed at a peripheral area of a point 6 of gaze, with making the subject gaze at one point 6 in a background 7, such that luminance of the background 7 becomes a numerical value belonging to a range between a numerical value smaller than the luminance of the target 5 by 10% and a numerical value larger than the luminance of the target by 10%. The target 5 is randomly displayed among predetermined multiple measurement points 300. In the respective measurement points 300, the examination apparatus requires the subject to replay whether or not to perceive the target 5, when there is no replay, enlarges the target 5 in a stepwise manner and, when there is a replay, reduces the target 5 in the stepwise manner. For each measurement point 300, the examination apparatus acquires a threshold as a dimension of the target 5 of dividing perception from non-perception a plurality of times (e.g., four times).SELECTED DRAWING: Figure 1【課題】被検者の視機能の検査において視野の各領域に対する色ごとの感度を適切に検査できる装置及び方法を提供する。【解決手段】被検者に背景７中の１点６を注視させた状態でその注視点６の周辺領域に、被検者の色に関する視機能を検査するための視標５を、背景７の輝度が視標５の輝度の１０％小さい数値と１０％大きい数値の間に属する数値となるように表示させる。視標５は、予め定められた複数の測定点３００間でランダムに表示させる。各測定点３００において、被検者に視標５を知覚できたことの応答を求めて、その応答が無い場合には視標５を段階的に大きくし、応答が有る場合には視標５を段階的に小さくする。そして、測定点３００ごとに、知覚の可否を分ける視標５の大きさである閾値を複数回（例えば４回）得る。【選択図】図１
