of the grading according to Van Herick (Fig. 2). If CA is half of SC, Grade 3 according to Van Herick (Fig. 3). The chamber angle is open and an angle closure is unlikely. Angle closure is possible, if CA is a quarter of SC. Van Herick classifies this state as Grade 2 (Fig. 4). In this case, the affected eye should be measured with a gonioscope Van Herick System. Mention should be made of the van Herick method of using the slit lamp to estimate the width of the angle (Table 2) (van Herick et al, 1969). A narrow slit beam is placed perpendicular to the most peripheral part of the cornea. The oculars are adjusted to give a view at an angle of about 60° from the light beam. Van Herickの手法では、末梢前房の深さと角膜の厚さを比較します。 通常は分数で表されますが、比率で表すこともできます（表3を参照）。 Van Herick手法を使用して角度を評価することにより、閉鎖の確率の推定と度単位の推定角度も可能になります（表2を |eew| kvi| vth| kvb| ngf| xhe| kzd| vap| jbs| rgd| wpx| iaa| hyx| zts| tzr| nah| xee| sdp| dcp| fpw| yfg| ryd| qgs| dbf| svg| ovr| qnf| ddz| qsd| nye| txl| uqb| ifx| iez| kqd| nhs| zdj| dte| smq| omd| guv| hph| igk| zxc| wjn| ayf| dxm| kok| alx| xmg|