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HUMAN BODY-EYE

AN   EYE  WORKS  LIKE  A  CAMERA  THAT  TAKES   PICTURES   OF  THE  WORLD  AROUND  US.without   them  ,it   would   become  very  difficult   for  us  ,to  do    even  a  small  task.
When  we   look  an  object  ,light   rays   enter    the   eye   through  the  pupil.A   colored    part   in  an  eye   ,called   Iris  ,controlled   the  amount  of   light  entering  the  into  the  eyes.When  the  light  falls  on  a  curved    transparent   lens   of  the  eye ,it  bend  the  light   so  that  a  clear  picture  is  formed  at  the  back  of  the  eye   on  the  area  called  retina .As   our  vision  changes  ,our  brain   makes  a   series  of  pictures,hundreds  of  times  a  second  .The  nerves  in  brain   make  sense  of  pictures-like change  in  colour,finding  edges  ,recognizing  shades   and   recognizing  shapes   of   the  objects.There   are   three  types  of   colour  sensitive  cells   in our  eyes    that  recognize   red,blue,and  green.All   other  colors   are  formed   with the   combination  of  these  colours.
FACTS-
  • The  average  person   blinks  about  12  times  a  minute.
  • An    eagle  can  see   a   rabbit  1  mile    away.
  • HUMAN EYE
  • People   who    are  colour  blind   can not  see  things  in  as  many  colors   as  people  who  have  normal   vision,and  they  can not  see certain  colors    like  red,  green   and  some   blues.
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