A hand-held, manual, ophthalmic surgical instrument intended to be used to cut the muscles of the eye during strabismus surgery. It comprises two pivoted blades that usually have finger and thumb ring-handles, and which cut with a shearing action (i.e., the fine blades cut when the sharpened edges pass one another as they are closed). It is typically made of metal and is available in various designs and sizes; some designs may additionally be used for cutting sutures and drapes. It is not intended for intraocular surgery. This is a single-use device.