These are the same as for discission, with the addition of a needle with a long cutting edge.
discission, di-sish′un, n. an incision into a tumour or cataract.
After a cataract has been removed, either by discission or extraction, an opaque membrane is usually left.
Although the operation of discission for after-cataract (capsulotomy) is simple it is not to be undertaken lightly.
The discission needle is made to pass behind the band whilst the cutting needle lies in front of it.
(ii) In dense capsular membranes following removal of a lens by discission in which a cutting needle cannot make a hole.
discission dis·cis·sion (dĭ-sĭzh'ən)
The incision of or cutting through a part.
An operation for soft cataracts in which the crystalline capsule is opened and the substance of the crystalline lens is broken up to allow it to be absorbed.