RT Book, Section
A1 Lueder, Gregg T.
SR Print(0)
ID 56151938
T1 Chapter 31. Disorders of the Retina
T2 Pediatric Practice: Ophthalmology
YR 2011
FD 2011
PB The McGraw-Hill Companies
PP New York, NY
SN 9780071633802
LK accesspediatrics.mhmedical.com/content.aspx?aid=56151938
RD 2024/09/13
AB The  retinal  is  a  multilayered  structure  that  lines  the  inside  of  the  back  of  the  eye.  Light  rays  are  focused  on  the  retina  by  the  cornea  and  lens.  When  they  reach  the  retina,  they  cause  chemical  reactions  in  the  deepest  layer  of  the  retina,  the  rods  and  cones  (photoreceptors).  This  creates  an  impulse  that  is  transmitted  through  the  middle  layer  of  the  retina  (the  bipolar  cells)  to  the  inner  portion  (the  ganglion  cells)  (Figure  31–1).  The  ganglion  cells  then  travel  and  coalesce  in  the  posterior  portion  of  the  eye  to  form  to  the  optic  nerve,  which  transmits  the  impulses  to  the  brain.  The  retina  is  analogous  to  the  film  in  a  camera,  in  that  it  senses  and  changes  in  reaction  to  light.