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Biomedical subjects

H M Clayman

Publications and source records attributed to H M Clayman.

At least 37 records · Page 2Linked to original sources
PubMed1982

Ovoid optic posterior chamber intraocular lens: the first one hundred cases.

A new posterior chamber intraocular lens with an ovoid optic is described. The horizontal diameter is 5 mm and the vertical 6 mm, permitting insertion through an incision fractionally greater than 5 mm. The results of the first 100 cases are presented; 97% of patients attained a visual acuity of 20/40 or better.

Aged↗
PubMed1982

A comparison of ICCE-Binkhorst intraocular lens and ECCE-posterior chamber intraocular lens, thirty-four to forty months postoperatively.

A retrospective study of 450 consecutive intracapsular cataract extractions with a Binkhorst lens implant, and 450 consecutive extracapsular cataract extractions with a posterior chamber lens implant, was performed. All patients were examined between 34 and 40 months postoperatively, except for those patients who died before this time, those lost to followup, or those who were otherwise unavailable during this time. The results suggest that the extracapsular series had a more favorable outcome than the intracapsular series, especially with regard to final visual acuity and the incidence of clinical cystoid macular edema.

Cataract Extraction↗
PubMed1982

Cystoid macular edema after intracapsular and extracapsular cataract extraction with and without an intraocular lens.

A prospective cystoid macular edema study of aphakic and pseudophakic patients showed that extracapsular cataract surgery has a lower rate than intracapsular surgery when the surgery is uncomplicated. There was no difference in the rates with intracapsular surgery with and without an intraocular lens. A complicated extracapsular with an intraocular lens has a higher rate than when the surgery is uncomplicated. In extracapsular surgery with complications, there is no difference in the rates with and without an intraocular lens. When complications occur, the ratio of clinical to angiographic-proven cases is higher than when the surgery is uncomplicated. This study included four series of uncomplicated cataract extractions and three series of complicated cataract extractions. A fluorescein angiogram was performed on every patient at least one year after surgery.

Cataract Extraction↗
PubMed1982

The results of extracapsular cataract extraction with a Shearing posterior chamber lens implant 34 to 40 months after surgery.

A series of 300 consecutive extracapsular cataract extractions with a Shearing posterior chamber lens implant (plus 13 with a surgical complication necessitating another kind of lens implant or no implant) was evaluated 34 to 40 months after surgery, except for those who died before this time (21 patients) and those lost to follow-up (15 patients). Ninety-one percent of the 264 patients who were examined achieved 20/40 or better visual acuity. Ninety-one percent of the 300 patients (those examined plus those who died and those lost to follow-up according to their last recorded examination) achieved 20/40 or better visual acuity. This series was compared to a previously reported series of 300 consecutive intracapsular cataract extractions with a Binkhorst iris clip lens implant examined 34 to 40 months after surgery.

Aged↗
PubMed1981

A fluorescein angiographic study of cystoid macular edema.

We performed a prospective fluorescein angiographic study on 66 patients who had undergone extracapsular cataract extractions with implantation of a Shearing posterior chamber intraocular lens. A primary posterior capsulotomy was performed in every case. The eyes were studied 11 to 23 months postoperatively. The incidence of cystoid macular edema (3%) was lower than that found in three series of cataract extractions previously reported. Extracapsular cataract extraction with either (1) a Shearing posterior chamber intraocular lens and a primary posterior capsulotomy or (2) a Binkhorst intraocular lens and an intact posterior capsule produces a lower rate of cystoid macular edema than does intracapsular cataract extraction either with a Binkhorst intraocular lens or without an intraocular lens. There was no significant difference in the incidence of cystoid macular edema in the two extracapsular series, indicating that preservation of an intact posterior capsule was not a significant factor.

Aged↗
PubMed1981

Intraocular lenses, axial length, and retinal detachment.

A large series of patients with intraocular lens implants had an overall 0.98% incidence of retinal detachment (eight detachments in 819 eyes). Within this group, patients with axial lengths of more than 25 mm had a statistically significantly higher incidence of retinal detachment (P = .054).

Aged↗
PubMed1981

Pupillary neuro-ophthalmic analysis in patients with intraocular lenses.

Many of the currently used lens implants are iris fixated and change pupillary shape. Concomitant iris surgery and posterior synechiae can make evaluation of pupillary responses difficult in the implanted patient. Pupillary evaluation if critical to neuro-ophthalmic diagnosis, and the presence or absence of a Marcus Gunn pupil is the most common clinical entity likely to be evaluated in the age group of patients with intraocular lenses. A Marcus Gunn pupil can be diagnosed when only one pupil is functional.

Adult↗
PubMed1981

Polypropylene.

Polypropylene is a polymer widely used in lens implantation, both as a loop material and as an intracameral suture. The chemistry and qualities of this material are discussed. Predicated on its usage in other types of surgery, it appears to be resistant to degradation. However, reports have suggested that it may degrade when exposed to high levels of ultraviolet radiation. This would not be a consideration in internal organs, but the eye is a unique case, and the matter should be studied further.

Animals↗
PubMed1980

The results of intracapsular cataract extraction with a Binkhorst iris clip lens implant 34 to 40 months after surgery.

A series of 300 consecutive intracapsular cataract extractions with a Binkhorst iris clip lens implant was evaluated 34 to 40 months after surgery, except for those patients who died before this time (30 patients) and those lost to follow-up (13 patients). Eighty-eight percent of the 257 patients achieved 20/40 or better visual acuity. The results were similar to those series previously reported by the authors where the final examination time for each patient was not uniform.

Aged↗
PubMed1979

Lens implantation, miosis, and glaucoma.

In a series of 1,079 patients, average age 76.3 years, 48 eyes required an iridoplasty for chronic miosis and, of these, visual acuity was 6/12 (20/40) or better postoperatively in 89.6% (43). In those patients with glaucoma, the control of intraocular pressure was the same or better than post-operative levels in 83.3% (15) of patients. Lens implantation was not contraindicated in the miotic patient if adequate iris surgery was performed before both cataract extraction and implant insertion. When there was concomitant glaucoma, lens implantation was likewise not contraindicated if the glaucoma was well controlled.

Aged↗
PubMed1979

Lens implantation and diabetes mellitus.

In a series of 1,160 implant cases, 82 patients were diabetic. In this subgroup, lenses were implanted in 87 eyes, and a visual acuity of 6/12 (20/40) or better was obtained in 77 (88.6%) of the patients, which compared well with the nondiabetic control group of 1,078 cases. Only patients with normal fundi or minimal background retinopathy were operated on, and the visual results obtained were independent of the diabetic medical management.

Aged↗
PubMed1979

Dislocation of Binkhorst four-loop lens implant.

A consecutive series of 1,093 Binkhorst four-loop lens implantations was used to examine the problem of dislocation of implants used in intracapsular cataract extractions; emphasis of the study was on the need for suture fixation. Transiridectomy suture fixation was used in 497 procedures, no suture was used in 403 procedures, and a simple iris suture technique was used in 193 procedures. Although the transiridectomy suture fixation procedure had the lowest percentage of dislocations, the iris suture technique is considered safer. Suture fixation is recommended for Binkhorst four-loop implants used in intracapsular cataract extractions.

Humans↗