-Above, lateral and below sharp border called falciform margin.

A double falciform ejection of water vapour from under the kettlelid at both sides simultaneously.

This column has a pair of falciform ears on each side of the front and contains twelve (sometimes eight) pollinia.

It can be present in three forms: purely anterior (persistent tunica vasculosa lentis and persistent posterior fetal fibrovascular sheath of the lens), purely posterior (falciform retinal septum and ablatio falcicormis congentia) and a combination of both.