The MST Toric Reference Marker (Item #AR0145) is a purpose-built ophthalmic instrument in the Calipers, Gauges & Markers portfolio. Three marking blades at 0, 90, and 180 degrees. 15mm diameter. Designed for marking with patient in the upright position. 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.