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要約 目的:瞳孔視野計で小さな視標を使い,早期緑内障の視野異常を検出した結果の報告。対象と方法:早期の緑内障10例11眼を対象とした。男性7名7眼,女性3名4眼で,年齢は31~78歳(平均59歳)である。原発開放隅角緑内障が4眼,正常眼圧緑内障が7眼にあった。瞳孔視野計で中心30°,76点の視野を視標サイズ4mm2で測定し,自動視野計による結果と比較した。結果:瞳孔視野計での視野異常検出率は53.2±32.5%,自動視野計との一致率は19.9±11.3%であった。Mariotte盲点は11眼中5眼(46%)で検出できた。結論:瞳孔視野計の視標を従来の64mm2から4mm2にすることで,早期緑内障の視野異常検出率が向上し,盲点が半数の症例で検出できた。自動視野計との一致率は,周辺での縮瞳率減弱のため低下した。
Abstract. Purpose:To report the result of detection of visual field defect in early-stage glaucoma using pupil perimetry with small target size. Cases and Method:The study was made on 11 eyes of 7 males and 3 females. The age ranged from 31 to 78 years,average 59 years. Primary open-angle glaucoma was present in 4 eyes and normal-tension glaucoma in 7 eyes. Visual field was tested on 76 points using infrared pupil perimeter with target size of 4 mm2. The findings were compared with those by automated perimetry. Results:Visual field defect was detected at the rate of 53.2±32.5% by pupil perimetry. Findings agreed with those by automated perimetry in 19.9±11.3%. Blind spot was detected in 5 out of 11 eyes(46%). Conclusion:Visual field defect in early glaucoma was detected at a higher rate by pupil perimetry using a smaller target size. Detection of blind spot was also facilitated. Findings with automated perimetry decreased due to lesser pupil reaction in the periphery.
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