000  $anz n  2
000  $a주제어
001  $aKSH2001016656
005  $a20021218000000
008  $a011114 n azknnaabn          |a a|a    | 
150  $a시각(각)[視角]
450  $wr$i영어$avisual angle
550  $wh$a최소 시각[最小視角]
550  $a란돌트환[--環]
550  $a시각적 축[視覺的軸]
550  $a시각적 표상[視覺的表象]
550  $a시력 검사[視力檢査]
550  $a시력[視力]