The Baerveldt implant (Fig 1) was developed for the treatment of refractory glaucoma in patients who were not considered likely to benefit from conventional glaucoma surgery. The pliable silicon single-plate implant comes in three sizes; all are larger than the single-plate Molteno implant, which is round and rigid. The shape of the Baerveldt implant conforms to the scleral curvature, and the wings must fit under two adjacent rectus muscles in the subtenons space without being wedged under the insertion. The 350-mm2 implant has a plate that is 32-mm wide by 14-mm deep, and is connected to the anterior chamber by a valveless silicon tubethat can be ligated with an absorbable suture to prevent overfiltration in the early stages before encapsulation of the implant occurs. The ligature can be either lysed with a laser or permitted to absorb enzymatically after several weeks.
Strabismus has been reported as a complication of
Ball SF, Ellis GS, Herrington RG, Liang K. Brown's Superior Oblique Tendon Syndrome After Baerveldt Glaucoma Implant. Arch Ophthalmol. 1992;110(10):1368. doi:10.1001/archopht.1992.01080220030010