Patent ID: 6908471

Claim:
An ophthalmologic knife for being guided into an incision formed at an eyeball and for widening the width of the incision, said knife comprising: a handle having an end portion; and a blade portion having a flat shape formed at the end portion of said handle, said blade portion having: a front tip, two cutting edges arranged on both sides of said blade portion in a narrowing manner toward the front tip of the blade portion, and a guide portion disposed in a width direction of the blade portion having an arc-shaped edge without a sharp tip disposed between the two cutting edges for guiding the blade portion into the incision formed at the eyeball, having a bottom surface, a top surface, a wedge-shaped cross section formed at a side cross section thereof in a longitudinal direction of the knife, cross sectional slopes formed at both the top surface and bottom surface thereof, and having a greater angle than that of the cutting edges, the top surface having an inclination angle different from that of the bottom surface.