a method for producing a surgical knife of a very small size for use in ophthalmic surgery under a microscopic environment having a sharp edge without causing reflection of lights . the surgical knife comprises a handle , and a blade attached to the handle . the blade has a sharp polished cutting edge , a rough machined surface provided inside of the cutting edge having a relatively rough surface area , and an inner flat area . an anti - reflection treatment is provided on an upper and lower surfaces of the blade except for the cutting edge , thereby prohibiting reflection or emission of lights from the knife .