By making visible sequentially target 16 that is projected to different locations, the need to monitor the fixation state means 26, 27 for measuring the visual field of an eye, means 18 for monitoring the fixation state of the field measurement, the eye to be examined In perimeter 1 provided the illumination means 20, 21, 22 to be illuminated with the brightness such, the diopter correction means 7 to correct the diopter of the eye, is provided in a detachable combination freely exchange the lens correction in diopter correction means 7 Brightness database 31 - lens shown the brightness of the illumination means when the response to the mounting mode of the correction lens which is mounted a lens holder 12, the lens holder unit 12 has, and is illuminated with a brightness substantially the same subjects eye 19 , means 29 for calculating the attachment mode of the correction lens for the diopter adjustment means 7, a lens, the brightness of the illuminating means corresponding to the mounting mode of the correction lens - means 29 for calculating determined based on the luminance database 31, the calculated providing the control means 29 based on the brightness of the illumination means, performs with respect to the eye illuminated by the illumination means. [Selection Figure 9異なる箇所に投影した視標16を順次視認させることで、被検眼の視野を測定する手段26,27、視野測定時の固視状態を監視する手段18、被検眼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、被検眼の視度を補正する視度補正手段7を設けた視野計1において、視度補正手段7に補正レンズを着脱交換組み合わせ自在に設けたレンズホルダー部12、レンズホルダー部12に装着された補正レンズの装着態様に応じて、被検眼19をほぼ同一の明るさで照明する際の照明手段の明るさを示したレンズ-輝度データベース31、視度補正手段7に対する補正レンズの装着態様を演算する手段29、補正レンズの装着態様に対応した照明手段の明るさを、レンズ-輝度データベース31に基づいて演算決定する手段29、演算された照明手段の明るさに基づいて、照明手段による被検眼に対する照明を行う制御手段29を設けた。【選択図】 図9
