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S B Lichtenstein

Publications and source records attributed to S B Lichtenstein.

9 recordsLinked to original sources
PubMed1992

A prospective, randomized, double-masked comparison of a zonal-progressive multifocal intraocular lens and a monofocal intraocular lens.

INTRODUCTION: Multifocal intraocular lenses (IOLs) have been designed to provide improved near visual acuity without spectacles compared with monofocal IOLs. Early studies have reported variables amounts of decreased visual acuity and contrast sensitivity with multifocal IOLs, and some patients have experienced halos and glare. METHODS: The authors performed a prospective, double-masked, multicenter evaluation of 62 patients randomized between a new zonal-progressive optic multifocal IOL and a monofocal IOL. RESULTS: Mean postoperative spherical equivalent, astigmatism, and uncorrected and best-corrected distance visual acuity were similar between the two groups. Patients with a multifocal IOL achieved significantly better uncorrected near visual acuity than patients with monofocal IOLs (J3+ versus J7; P less than 0.0001). With distance correction only, mean near visual acuity was J2 versus J5- (P = 0.0001). Best-corrected near visual acuity was J1 for both groups, with 1.36 diopters (D) for the multifocal group versus 2.37 D for the monofocal group (P less than 0.0001). Regan contrast sensitivity was lower for the multifocal patients at all contrast levels, and achieved statistical significance at very low contrast (11% contrast; P = 0.0024). Fifty-two percent of patients with a multifocal IOL reported that they did not need spectacles at all or used them only for their fellow eye, compared with 25% of the patients with monofocal IOLs. CONCLUSION: Both monofocal and multifocal implant patients were very satisfied with the results of their cataract extraction and IOL implant surgery. A small loss of contrast sensitivity with the multifocal IOL was demonstrated, consistent with theoretical predictions. The functional significance of the loss of contrast sensitivity appears to be small and counterbalanced by the advantage of improved uncorrected near visual acuity.

Aged↗
PubMed1987

Visual aberrations caused by optic components of posterior chamber intraocular lenses.

A 58-year-old airline pilot had cataract surgery with implantation of a posterior chamber intraocular lens with four positioning holes around the optic edge. During periods of maximum pupil dilation, such as at night, visual aberrations including glare, monocular diplopia, and haloes occurred and he was unable to work in his occupation. The symptoms were severe enough that lens exchange was required, and a posterior chamber lens with no positioning holes was successfully implanted. The symptoms immediately subsided postoperatively and his last known visual acuity was 20/15. This case, and the report of another patient with similar postoperative problems, illustrates that implantation of lens optics with a larger effective optical zone for posterior chamber lens implantation is desirable. This is particularly true now that younger, more active patients, many still engaged in occupations, are having lens implantations.

Cataract Extraction↗
PubMed1986

Corneal opacities secondary to Viscoat.

Viscoat is a new viscoelastic solution of chondroitin sulfate and sodium hyaluronate dissolved in a phosphate buffer. Recent findings of postoperative corneal deposits in association with its use have been reported to Cilco. The corneal deposits are noted 18 to 48 hours postoperatively and are similar in appearance to calcific band keratopathy. The clinical characteristics and prognosis of this entity are reviewed. Possible methods of treatment and recommendations for prevention are discussed.

Aged↗
PubMed1984

Intraocular lenses in myopes.

A series of 40 consecutive myopic eyes with intraocular lens implants of 13.0 diopters or less was examined with regard to visual result, complications and accuracy of commonly used lens implant power formulas. Recommendations are given for the use of implants in myopic patients as well as the various approaches to visual rehabilitation of the anisometropia in the fellow eye following surgery.

Aged↗
PubMed1980

The Kelman and other anterior chamber lenses.

The advantages and disadvantages of various anterior chamber lenses are presented and compared. In addition, a tendency is detailed to illustrate the increasing frequency of too small a lens being inserted as an operative complication. Lastly, the early results of the new Kelman anterior chamber lens are presented.

Anterior Chamber↗
PubMedDate not supplied

Familial simple ectopia lentis: a case study.

Hereditary simple ectopia lentis affected nine patients in three generations of a family. Inheritance appeared to be autosomal dominant. Examination of 12 family members, employing body proportion measurements, chest x-ray, echocardiogram, and urinary cystine or blood methionine levels, revealed no evidence of any systemic disease. In all cases except two, lenses were bilaterally and superiorly dislocated. The degree of dislocation varied considerably among those affected, causing no visual disturbance in some and severely limiting visual acuity in others. Visual deficits were greatest in patients with intermediate degrees of dislocation. To date, the only known complications related to the dislocations have been two cases of bilateral cataracts. The indications for lensectomy in patients with ectopia lentis are reviewed.

Ectopia Lentis↗