| 摘要 |
An ophthalmic device (1) includes a base (5), a suction ring (3) connected to the base (5) to secure the device (1) to the eye (E) of a patient, and a support piece (13) carrying a pair of securely ganged cutting blades (7,9) having cutting edges (47) oriented at an angle with respect to one another. The support piece (13) can be raised and lowered with respect to the eye surface, and rotated around the base (5) to simultaneously form two incisions along a path on the eye. The device (1) includes a mechanism for progressively advancing the two cutting blades (7,9) together in the support piece (13), while maintaining a constant angular cutting edge relative orientation, to a position in which the cutting points (49) of the two cutting blades (7,9) are touching, and can thus be used to form an annular wedge-like cut of eye tissue in the treatment of refractive errors. In alternative embodiments, laser or electrosurgical knives may be used instead of cutting blades. |
