The MST 8.0mm LASEK Epithelial Trephine (Item #AR0610) is a purpose-built ophthalmic instrument in the LASEK Instruments portfolio. Designed around its specific working geometry, it features 8.0mm diameter. 8.0mm and 9.5mm diameter. Round handle. This combination of thoughtful design details and clearly defined specifications helps surgeons quickly identify the configuration that best fits their preferred technique and procedural needs.