Capsulotomy device
The present invention provides a lens capsule incision device capable of applying differential power for lens capsule incision to a lens capsule incising part according to the contact states of electrodes of the lens capsule incising part with the lens capsule. The lens capsule incision device, which has a lens capsule incising part adapted to incise the lens capsule and having electrodes, includes: a measuring part for measuring an impedance in a state in which the electrodes of the lens capsule incising part come into contact with the lens capsule; a state determining part for determining a current contact state of the electrodes with the lens capsule, based on the impedance measured through the measuring part; and a power application part for applying differential power for lens capsule incision to the lens capsule incising part according to the current contact state determined by the state determining part.
1 . A lens capsule incision device having a lens capsule incising part configured to incise a lens capsule and having electrodes, comprising:
a measuring part for measuring an impedance having a different value depending on whether the electrodes of the lens capsule incising part come into contact with the lens capsule;
a state determining part for determining a current contact state of the electrodes with the lens capsule based on the impedance measured by the measuring part, the current contact state corresponding to at least one of contact states associated with the impedance; and
a power application part for applying differential power for a lens capsule incision to the lens capsule incising part according to the current contact state determined by the state determining part,
wherein the impedance includes: a first impedance measured before the electrodes are inserted into an eyeball from outside the eyeball; a second impedance measured in a state in which the electrodes are being inserted into the eyeball from outside the eyeball; a third impedance measured in a state in which the electrodes come into contact with the lens capsule and are kept in contact therewith; a fourth impedance measured in a state in which the electrodes start to output current to the lens capsule; a fifth impedance measured in a state in which the lens capsule is incised and the electrodes are kept in contact with the incised lens capsule; a sixth impedance measured in a state in which the electrodes are being removed from the eyeball to the outside; and a seventh impedance measured in a state in which the electrodes are removed from the eyeball to the outside.
2 . The lens capsule incision device according to claim 1 , wherein the state determining part receives the impedance measured by the measuring part, compares the received impedance with pre-stored impedance information according to the contact states of the electrodes, detects impedance information matching with the received impedance, and determines the current contact state of the electrodes with the lens capsule.
3 . The lens capsule incision device according to claim 2 , wherein the pre-stored impedance information according to the contact states of the electrodes comprises at least one of an impedance variation amount, an impedance average, an impedance distribution, a value obtained by analyzing the impedance variation amount by convolution, a value calculated through mathematical operations, or any combination thereof.