[Precision of lamellar refractive corneal lenticules].
We studied the changes in central lenticular thickness in 40 porcine corneal specimens subjected to refractive modification on the "Hamburg Refractive Bench." The changes in thickness attempted were +0.1 mm (group 1), +0.2 mm (group 2), -0.15 mm (group 3), and -0.25 mm (group 4). The lenticular thickness was determined by ultrasound in nine positions. When the intended changes in central corneal thickness were compared with the actual changes, the findings were +0.1047 in group 1, +0.169 in group 2, -0.1047 in group 3, and -0.2185 in group 4. We conclude that minor modifications in lenticular thickness can be achieved with high precision, but for large corrections in the hyperopic direction, only 85% of the desired changes can be accomplished.
Böhnke
M
M
Universitäts-Augenklinik, Hamburg, Bundesrepublik Deutschland.
Draeger
J
J
Kohlhaas
M
M
D000818:Animals; D016039:Corneal Transplantation / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D008866:Microsurgery / Q000295:instrumentation / Q000379:methods; D012029:Refraction, Ocular; D013552:Swine
Die Präzision lamellärer refraktiver Hornhautlentikel.