filtering bleb

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
References in periodicals archive ?
The goal of glaucoma filtration surgery is to reduce IOP by facilitating drainage of aqueous humor through a surgically created fistula into a filtering bleb, where the fluid is captured and reabsorbed into the systemic circulation.
Also, the new stent is intended to eliminate the need for a filtering bleb, a permanent, unsightly blister created during surgery that enables drainage postoperatively.
The Seidel test may also be used to assess leakage from post-operative corneal wounds and filtering blebs following glaucoma surgery.