P 102 Anatomic variations of the extra- and intraorbital part of the ophthalmic artery

A total of 50 pairs of pig eyes was exsmined by meam of ultraPound pachymetry (&h-Pen, Mentor and DGH-Pachette 500, Technomed). The comeal thickness was de&m&d inunediately ai?er em~~leation and after 1) storage in a moist chamber; 2) storage io aqus bide&; 3) Dholoablation with the excimer-laser. l&.&The swelling of different almeas underlied high fluctuations, whereas the differmca between the right and lefl eye in one individuum were vezy little. The average comeal swellii after six hours storage in a moist chamber was 170 pm with a standard deviation of 26 Wm. On the other hand, the aversge diffenmce in comeal swellii between the right and left eyes was only 10 pm. The cmdation codficient of comeal swelling between the right and tbe left eye was 0,83. Similar results were found for storage in aqua bidest and at?ez cxcimer-laser ablation. It could be show”, that the time worse. of comeal swelling varied in a wide range: some eyes showed intense swelliig very early, whereas in other eyes this increase developed later. Pairs of corneas, however, showed a nearly identical behaviow: Conelusion: Refdng pairs of eyes is performed fryyII~uy, because a similar pat@” of biological and biochemical processes is assumed. Our results could prove the similarity concemi”g the comeal swelling quantitatively. Using this method, less individuals are necessary for statistical analysis.