RT Book, Section
A1 Lueder, Gregg T.
SR Print(0)
ID 56151085
T1 Chapter 26. Disorders of the Orbit
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=56151085
RD 2024/04/19
AB The  orbit  is  the  space  in  the  skull  in  which  the  eye  and  extraocular  muscles  are  located.  It  is  cone-shaped,  widest  anteriorly  and  tapering  to  the  orbital  apex,  through  which  the  optic  nerve  passes.  The  orbits  are  demarcated  by  the  bones  of  the  skull  (Figure  26–1).  The  roof  consists  of  a  portion  of  the  frontal  bone  and  the  lesser  wing  of  the  sphenoid  bone.  The  frontal  lobes  of  the  brain  lie  above  this  area.  The  medial  orbital  wall  is  composed  of  the  lacrimal  bone  and  portions  of  the  ethmoid,  maxilla,  and  sphenoid  bones.  The  ethmoid  sinuses  are  adjacent  to  this  wall.  The  floor  of  the  orbit  is  composed  of  the  maxilla  and  a  portion  of  the  zygomatic  bone.  It  lies  above  the  maxillary  sinus.  The  lateral  wall  is  formed  by  the  zygomatic  bone  and  the  greater  wing  of  the  sphenoid.