Stab Incision Glaucoma Surgery: A Modified Guarded Filtration Procedure for Primary Open Angle Glaucoma

Figure 1

Stab incision glaucoma surgery (SIGS). (a), (b) Superior conjunctiva is slid downwards over the cornea and a 2.8 mm bevel-up metal keratome is introduced 1.5 mm behind the limbus. (c) Keratome is passed through the conjunctiva and into lamellar sclera and a superficial lamellar scleral tunnel is then dissected. (d) Keratome is introduced about 0.5–1 mm into the clear cornea and the anterior chamber (AC) is then entered.

(a)

(b)

(c)

(d)