Flattening of central corneal curvature with Intrastromal Corneal Rings of increasing thickness: An eye-bank eye study

摘要: Abstract Intrastromal Corneal Rings (ICRs) have been demonstrated to flatten human corneas when implanted into peripheral intrastromal corneal channels. To study the flattening effect, ICRs of increasing thickness, 0.26, 0.31, 0.36, 0.41, and 0.46 mm, were placed oversized (approximately 70% depth) channels in 38 eye-bank eyes. Each 33 eyes received one ICR; mean change dioptric data was obtained for four meridians using an intraoperative photokeratoscope. rings thickness resulted 3.8 ± 1.1, 4.9 0.6, 5.2 5.3 1.9, 7.3 1.6 diopters, respectively, keratoscope mire 2. One each size ICR five additional eyes; degree measured by laser holographic interferometry 1.8, 2.9, 5.5, 4.7, 10.1 central 6 mm zone. These results indicate that provides a fairly linear relationship over range thicknesses tested. Additionally, wave unit maps preoperative postoperative tends preserve positive asphericity if present preoperatively.