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J S Cumming

Publications and source records attributed to J S Cumming.

6 recordsLinked to original sources
PubMed2001

Clinical evaluation of the model AT-45 silicone accommodating intraocular lens: results of feasibility and the initial phase of a Food and Drug Administration clinical trial.

OBJECTIVE: To evaluate the clinical outcomes in cataract patients after implantation of an accommodating intraocular lens, designed to move forward and backward along the visual axis. DESIGN: Prospective, noncomparative case series. PARTICIPANTS: Sixty-two patients scheduled for small-incision, extracapsular cataract extraction by phacoemulsification. METHODS: Twenty-eight eyes of 14 patients in the feasibility phase of the study and 48 eyes of 48 patients in the next phase of study underwent cataract extraction and implantation of the AT-45 accommodating intraocular lens. Prospective follow-up was analyzed at 1 month after surgery and compared with baseline characteristics 1 month and 3 to 6 months after surgery. MAIN OUTCOME MEASURES: Postoperative distance (uncorrected and best corrected), near (uncorrected, through the distance correction, best-corrected, i.e., with add), and intermediate (through the distance correction) visual acuity. RESULTS: All patients with monocular pseudophakia had best-corrected distance visual acuity of 20/40 or better. Patients with bilateral pseudophakia had best-corrected visual acuity of 20/25 or better when tested binocularly. The results from 28 eyes of 14 patients participating in the feasibility study were combined with those from 48 eyes of 48 patients included in the next phase of the AT-45 study. Uncorrected distance visual acuity was 20/40 or better in most patients (90%, or 56 of 62 eyes implanted and available for follow-up). Ninety-seven percent of patients (60/62) had uncorrected near visual acuity of 20/30 or better. Forty-eight eyes had intermediate visual acuity measured at 28 inches without 'add', and 44 of them (92%) achieved 20/30 or better. No complications or adverse events were reported. CONCLUSIONS: The AT-45 accommodating intraocular lens, designed to allow movement along the visual axis of the eye by using the natural physiology of the intact ciliary muscle after cataract removal, provides patients with excellent uncorrected distance, intermediate, and near visual acuity and should be considered as a modality to allow the majority of pseudophakic patients to see at all distances without glasses.

Accommodation, Ocular↗
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↗