We retrospectively studied pars plana Molteno implantation in seven pa
tients who had previously undergone multiple attempts, both medical an
d surgical, to control intraocular pressure (IOP), to no avail. In an
effort to avoid further anterior chamber complications, a Molteno impl
ant was inserted through the superior temporal vitrectomy port, follow
ing a complete pars plana vitrectomy. Acuity decreased in two of the s
even patients due to preexisting conditions and one patient lost visio
n. Preoperative IOPs ranged from 29 to 57 mm Hg (mean 41 mm Hg) and po
stoperative IOPs ranged from 7 to 20 mm Hg (mean 12 mm Hg).