A sharp instrument, such as a thorn or needle, is used to pierce the eye either at the edge of the cornea or the sclera, near the limbus. The opaque lens is pushed downwards, allowing light to enter the eye. Once the patients sees shapes or movement, the procedure is stopped. The patient is left without a lens (aphakic), therefore requiring a powerful positive prescription lens to compensate.
Couching 
Craterization
Bookmarking
Denudation 
Bread loafing
Granulation
Moist desquamation
Desquamation