PROBLEM TO BE SOLVED: To provide a perimeter for accurately detecting a fixation state.SOLUTION: In the perimeter having a means for measuring a visual field of an eye 19 to be examined when the eye 19 perceives a visual target 16 projected in order at different positions on a projection member, a fixation state monitoring means 18 which monitors the fixation state of the eye 19 in perimetry and includes illuminating means 20, 21, 22 for illuminating the eye 19 with the brightness necessary for monitoring the fixation state of the eye 19, and a visibility correcting means for correcting the visibility of the eye 19 the visibility correcting means is provided to move between a set position corresponding to a measurement position of the eye to be examined and a stored position retracted to an outer peripheral part of the projection member. The perimeter further includes a means for detecting whether the visibility correcting means is located at the set position or the stored position and an illumination control part for changing the brightness of the illumination to the eye 19 by the illuminating means 20, 21, 22 in accordance with the detected position of the visibility correcting means.COPYRIGHT: (C)2012,JPO&INPIT【課題】正確に固視状態を検知することが出来る、視野計を提供する。【解決手段】被検眼19に、投影部材上の異なる箇所に投影した視標16を順次視認させることで、被検眼19の視野を測定する手段、被検眼19の視野測定時の固視状態を監視する固視状態監視手段18を有し、固視状態監視手段18は、被検眼19を固視状態の監視に必要な明るさで照明する照明手段20、21、22を有し、被検眼19の視度を補正する視度補正手段を設けた視野計において、視度補正手段を、被検眼の測定位置に対応するセット位置と、投影部材の外周辺部に待避した収納位置との間で移動自在に設け、視度補正手段が、セット位置に在るか、収納位置に在るかを検出する手段を設け、検出した視度補正手段の位置に応じて、照明手段20、21、22による被検眼19に対する照明の明るさを変更する照明制御部を設けた。【選択図】図8
