Atlas and epitome of operative ophthalmology . lectric circular saw (Fig. 116).This bone incision must not be placed too high, to avoid open-ing the cranial cavity. Beginning at this horizontal upperincision the bone is divided with a sharp chisel (in ordernot to splinter the bone) in a straight line runningobliquely through the lateral wall of the orbit to the ele-vator, which is fixed in the anterior orbital fissure—i. e.,to a point 1 cm. behind the anterior extremity of the fis-sure ; at the same time the orbital contents are gentlypressed toward the nasal side with the elevator. Thenext st
Atlas and epitome of operative ophthalmology . lectric circular saw (Fig. 116).This bone incision must not be placed too high, to avoid open-ing the cranial cavity. Beginning at this horizontal upperincision the bone is divided with a sharp chisel (in ordernot to splinter the bone) in a straight line runningobliquely through the lateral wall of the orbit to the ele-vator, which is fixed in the anterior orbital fissure—i. e.,to a point 1 cm. behind the anterior extremity of the fis-sure ; at the same time the orbital contents are gentlypressed toward the nasal side with the elevator. Thenext step consists in a horizontal division with a chisel ora saw of the frontal process of the zygoma, close to itsbase; this is also continued into the fissure. The pieceof bone is now movable and may be reflected outwardalong with the skin-fascia-muscle flap of the temporalregion far enough to give free access to the orbit, which isstill half-covered by the periorbita (Plate 10). The lattermust be split from before backward with the blunt scis-.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectophthalmologicsurgic
