filtering bleb

(redirected from filtering cicatrix)

filtering bleb

a blister of conjunctiva resulting from glaucoma surgery by which a flap of sclera is created in the eye wall, allowing aqueous humor to percolate out of the eye and underneath the conjunctiva, thus lowering intraocular pressure.
Synonym(s): filtering cicatrix

fil·ter·ing bleb

(fil'tĕr-ing bleb)
A blister of conjunctiva resulting from glaucoma surgery by which a flap of sclera is created in the eye wall, allowing aqueous humor to percolate out of the eye and underneath the conjunctiva, thus lowering intraocular pressure