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Biomedical subjects

J S Cumming

Publications and source records attributed to J S Cumming.

5 recordsLinked to original sources
PubMed1993

Postoperative complications and uncorrected acuities after implantation of plate haptic silicone and three-piece silicone intraocular lenses.

Complications after implantation of 503 plate haptic silicone intraocular lenses were compared with those after implantation of 253 silicone three-piece polypropylene loop lenses. The uncorrected visual acuities were also compared. Capsulorhexis and endocapsular phacoemulsification were used in all cases. The incidence of cystoid macular edema and posterior capsule opacification requiring a YAG capsulotomy were significantly higher in the cases with polypropylene three-piece loop lenses. Pigment dispersion and decentration also occurred more frequently in this group. This is probably because the 10.5 mm plate haptic lens is more rigid than the polypropylene loop lens. It also fixates more posteriorly within the capsular bag than the anteriorly located polypropylene lens. Patients implanted with a plate haptic silicone intraocular lens through a 3.5 mm scleral incision had significantly better uncorrected visual acuity at five to six weeks postoperatively than those with a three-piece silicone lens that required a 4.5 mm incision for insertion.

Aged↗
PubMed1993

Surgical complications and visual acuity results in 536 cases of plate haptic silicone lens implantation.

Implantation of a plate haptic intraocular lens was planned in 536 cases. This paper reports the uncorrected and corrected visual acuities and complications in 33 patients in whom there were surgical complications that prevented implantation of the plate haptic lens. Excluding five patients (15%) who had pre-existing pathology, 21 (75%) had uncorrected acuity of 20/40 or better and 27 (96%) had corrected acuity of 20/40 or better five to six weeks postoperatively. The plate haptic lens can only be used with capsulorhexis and an intact anterior capsular rim and posterior capsule. Two alternative backup lens styles--a loop lens for placement in the torn bag or the sulcus and an anterior chamber lens--have to be in the operating room for each surgery.

Cataract Extraction↗