Böhnke M, Draeger J, Kohlhaas M
Universitäts-Augenklinik, Hamburg, Bundesrepublik Deutschland.
Fortschr Ophthalmol. 1990;87(6):659-61.
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.
我们研究了40个猪角膜标本在“汉堡屈光实验台”上进行屈光矫正时中央晶状体厚度的变化。尝试的厚度变化分别为+0.1毫米（第1组）、+0.2毫米（第2组）、-0.15毫米（第3组）和-0.25毫米（第4组）。通过超声在九个位置测定晶状体厚度。当将预期的中央角膜厚度变化与实际变化进行比较时，第1组的结果为+0.1047，第2组为+0.169，第3组为-0.1047，第4组为-0.2185。我们得出结论，晶状体厚度的微小改变可以高精度实现，但对于远视方向的较大矫正，只能完成所需变化的85%。
