Biomedical subjects

A Loewenstein

Publications and source records attributed to A Loewenstein.

113 records · Page 7Linked to original sources

PubMedDate not supplied

Combined transverse and interrupted radial keratotomy for compound myopic astigmatism.

BACKGROUND: A variety of patterns of keratotomy are used to correct naturally occurring astigmatism. We evaluated straight transverse incisions with interrupted radial incisions (jump radials). METHODS: In 32 human eyes with naturally occurring astigmatism, we used straight transverse incisions with interrupted radial incisions, with or without additional radial keratotomy, to correct compound myopic astigmatism. The range of preoperative refractive astigmatism was 1.00 to 3.50 D. RESULTS: The mean follow-up time was 15 months (range, 12 to 18 months). The average surgically corrected astigmatism was 1.55 +/- 0.29 D. Eighty-seven percent of the eyes achieved less than 1.00 D of astigmatism, and the remaining four eyes retained 1.00 to 1.25 D of astigmatism. CONCLUSION: Combined transverse and interrupted radial incisions are effective in correcting naturally occurring astigmatism.

Adult↗

PubMedDate not supplied

Scraping of epithelium for treatment of undercorrection and haze after photorefractive keratectomy.

We report an easy, safe technique to treat regression and haze after excimer laser photorefractive keratectomy (PRK), in which the hyperplastic epithelium is removed manually. The results of scraping of epithelium in 21 eyes of 20 patients are presented. Mean follow-up time was 3 months (range 1 to 7). The mean spherical equivalent refraction before photorefractive keratectomy was -9.93 +/- 2.95 diopters (D); the mean spherical equivalent refraction before epithelial scraping was -3.82 +/- 2.87 D; after scraping it declined to -2.63 +/- 4.04 D. The uncorrected visual acuity after scraping was 20/50 or better in 6 eyes. In 5 others it was between 20/60 and 20/100, and in 10 eyes it was worse than 20/100. The corrected visual acuity after scraping was 20/30 or better in 8 eyes, between 20/40 and 20/60 in 8 eyes, and between 20/60 and 20/100 in 5 eyes.

Adult↗

PubMedDate not supplied

Astigmatic keratotomy followed by photorefractive keratectomy in the treatment of compound myopic astigmatism.

Eleven eyes of 9 patients that had compound myopic astigmatism were treated by astigmatic keratotomy followed 1 month later by photorefractive keratectomy (PRK). In 9 eyes arcuate incisions were performed, in 1 eye a modified Ruiz procedure was performed, and in 1 eye radial T cuts were done. The mean spherical equivalent was -8.26 +/- 2.51 diopters (D) after the astigmatic keratotomy but before photorefractive keratectomy, and -0.36 +/- 0.93 D after photorefractive keratectomy. The mean cylinder was -3.11 +/- 1.16 D preoperatively, and -0.14 +/- 0.9 D postoperatively. Combined astigmatic keratotomy and photorefractive keratectomy are effective treatments for compound myopic astigmatism.

Adult↗

PubMedDate not supplied

Photorefractive keratectomy for the treatment of myopia after epikeratoplasty: a case report.

An aphakic eye with a +9.00 diopter (D) refraction developed high myopia of -13.00 D after applying epikeratoplasty using a +14.00 D lenticule. We preformed photorefractive keratectomy by excimer laser. The procedure was uneventful, with no postoperative pain. Epithelialization occurred as usual. Recovery of the cornea followed the usual course with initial overcorrection followed by certain regression. After 7 months follow-up the spherical equivalent was -3.25 D and the lenticule was clear. In myopia after epikeratoplasty photorefractive keratectomy is an effective alternative to lenticule exchange.

Aphakia, Postcataract↗

PubMedDate not supplied

Phototherapeutic keratectomy in the treatment of corneal scarring from trachoma.

Trachoma is still one of the world's major blinding diseases. Characteristically, trachoma causes deep scarring of the conjunctiva and tarsus that can result in tear deficiency, trichiasis, and entropion. Another common finding is a diffused corneal opacity that is the end stage of peripheral and central corneal infiltrates. The conventional treatment of the corneal opacities is keratoplasty, which has a guarded prognosis because of severe dryness and trichiasis. We report on our experience in treating patients with corneal trachoma with phototherapeutic keratectomy (PTK) with the excimer laser.

Aged↗