Biomedical subjects
Publications and source records attributed to R H Wallyn.
In a series of 629 consecutive retinal detachments, 20 (3%) eyes had preoperative subretinal fibrosis without preretinal fibrosis. The incidence varied in a linear fashion with the duration of the detachment, varying from 0.8% in cases less than one month old to 22% in cases estimated to be more than two years old. Nineteen of the 20 detachments were anatomically cured by scleral buckling.
A 70-year-old woman developed massive subretinal exudation after surgical repair of a rhegmatogenous retinal detachment. Postoperative choroidal detachment suggested a choroidal source of the subretinal exudate. We believe the cause of the choroidal detachment and exudation was vortex ampulla obstruction resulting from the encircling band. The subretinal exudate underwent gradual resolution and did not influence the anatomic result of retinal reattachment.
Six hundred consecutive retinal detachments were operated on with silicone scleral buckles. Twenty-three implants, or 3.8%, were removed. There was one solid silicone implant and 22 silicone sponges. Removal was required because of infection (seven eyes), foreign-body sensation without infection (seven eyes), recurrent subconjunctival hemorrhages (four eyes), impingement on the optic nerve (one eye), and distortion of the macula (four eyes). The postoperative infection rate was 1.8% for silicone sponges, and there were no infections in eyes buckled with solid silicone. Only one retina redetached after buckle removal, yielding a recurrence rate of 4%. The one recurrence was successfully managed by a second scleral buckle.
A controlled, double-masked study in which patients with cystoid macular edema of more than four months' duration were treated with indomethacin failed to demonstrate a significant visual improvement when compared to patients who were treated with placebo.
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