With the lacrimal sac tented, an "H" shaped incision is made. This may be made with a cataract surgery keratome, a number 11 blade, or Wescott scissors. It is essential to avoid damage to the internal ostium at this point and open the sac fully. Any stones can be removed, and biopsi...
1, thickness of orbital portion of the supraorbital process of the frontal; 2, size of antorbital process; 3, size of postorbital process; 4, relative thickness of maxilla covering of supraorbital process of frontal; 5, shape of anterior end of zygomatic process of frontal; 6, concavity and...