Trial Lens Clips with added spirit levels permit measurement of the proper angle for cylinder application. Also attach to existing Rx for a quick opportunity to over refract. Levels insure proper horizontal alignment. Use of a chin rest may be advisable. Once patient’s distance Rx is correct, be sure the clip is level and add cylinder at the proper angle and record. Similar to Jannelli™ Clips. Each side holds 3 standard 38mm trial lenses. Springs have vinyl coating to avoid damage to existing Rx. Includes velvet draw string pouch.