In human eye, the focusing is done by(a) to and fro movement of eye lens(b) to and fro movement of - Physics - Ray Optics And Optical Instruments

Question

I n   h u m a n   e y e ,   t h e   f o c u sin
g   i s   d o n e   b y ( a )   t o   a n
d   f r o   m o v e m e n t   o f   e y e
  l e n s ( b )   t o   a n d   f r o   m
o v e m e n t   o f   t h e   r e t i n a ( c )
  c h a n g e   i n   t h e   c o n v e x i t y
  o f   t h e   l e n s   s u r f a c e ( d )
  c h a n g e   i n   t h e   r e f r a c t i v
e   i n d e x   o f   t h e   e y e   f l
u i d s

Pintu B. · Accepted Answer

Dear Student ,
Look as the eye lens can change its focal length , by focussing on
an object whether its is closer or at some distance
Regards