) ( ) ( )
1.
adequate stimulus (sensory threshold)
(touch-sense) (pressure sense)
(warmth-sense) (clod-sense) 15 40
1/f=(n-1)(1/r1-1/r2) AB( )/Bn( ) ab( )/nb( )
1.4.1 myopia myopia
1.4.2 hyperopia hyperopia
1.4.3 astigmatism astigmatism
-40 mv Na Na Na Na Na cgmp (transductio n) cgmp Na ( )
3 3 3 4 1 0 2 8 1
b * * 5-8 min 25-30min
2