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Biomedical subjects

M L Kwitko

Publications and source records attributed to M L Kwitko.

At least 19 recordsLinked to original sources
PubMed1998

Radial keratotomy for residual myopia after photorefractive keratectomy.

PURPOSE: To evaluate the safety, efficacy, and complications of radial keratotomy (RK) after photorefractive keratectomy (PRK) for myopia. SETTING: Laser Ultravision Institute. Montreal, Canada. METHODS: Surgically induced refractive and visual acuity changes were retrospectively evaluated in 14 eyes of 10 patients treated with RK after PRK. All patients had simple myopia or compound myopic astigmatism. Minimum follow-up was 6 months. RESULTS: Three eyes (21%) had one PRK, 7 (50%) had two treatments, and 4 (29%) had three. Eleven eyes (79%) required four-incision RK and 3 (21%), eight-incision RK. All patients had improved uncorrected visual acuity. Six months after the RK retreatment, there was a significant reduction in spherical equivalent of 2.93 diopters +/- 1.53 (SD) (P < .05). No intraoperative or postoperative complications occurred except overcorrection (two cases). CONCLUSION: Radial keratotomy is an effective, safe method for treating undercorrected myopia after PRK. Further study and analysis of this series of patients are planned.

Adult↗
PubMed1996

Arcuate keratotomy to correct naturally occurring astigmatism.

PURPOSE: To evaluate retrospectively the safety, efficacy, and complications of arcuate keratotomy (AK) in correcting naturally occurring astigmatism. SETTING: Laser Ultravision Institute, Montreal, Canada. METHODS: Surgically induced refractive change was evaluated in 25 eyes of 15 patients with naturally occurring astigmatism. All patients had mixed or compound myopic astigmatism and were treated with AK alone or both AK and radial keratotomy (RK). Minimum follow-up of 24 months was necessary for inclusion in this study. We used vector analysis to evaluate the refractive and keratometric astigmatic change at 1 month and 1 and 2 years. RESULTS: Ten eyes (40%) had AK only and 15 eyes (60%), both AK and RK. It was necessary to redeepen the original incisions in 21 eyes (84%). All patients had improved uncorrected visual acuity postoperatively. The reduction in refractive cylinder, quantified by vector analysis, was significant. Two years postoperatively, mean reduction was 3.30 diopters (D) +/- 1.32 (SD) in eyes that had AK alone and 2.71 +/- 1.53 D in eyes that had both AK and RK. CONCLUSION: Arcuate keratotomy is an effective and safe method for correcting naturally occurring astigmatism. Further analysis of this series of patients is planned.

Adult↗
PubMed1996

Excimer laser photorefractive keratectomy: one year follow-up.

BACKGROUND AND OBJECTIVE: To confirm the effectiveness of the 193 nm excimer laser to correct low myopia (1.00 to 6.00 D), moderate myopia (6.00 to 10.00 D), and high myopia (10.00 D and above). PATIENTS AND METHODS: One hundred eighty-one eyes of 114 patients underwent excimer laser photorefractive keratectomy (PRK). The minimum follow-up was 12 months. RESULTS: After one year, 96% of the eyes in the low myopia group, 69% in the moderate myopia group and 29% in the high myopia group achieved uncorrected visual acuity of 20/40 or better with one treatment using a single application with a 5 mm optic zone. There were no significant major complications. CONCLUSION: PRK is a safe, effective and relatively accurate procedure to correct low to moderate myopia.

Adolescent↗
PubMed1979

The Fyodorov Sputnik intraocular lens.

The author has implanted 197 Fyodorov intraocular lenses. With careful selection of patients, good surgical judgment, and meticulous surgery, a degree of success can be obtained with this lens, which will equal that of conventional cataract surgery. The surgical technique of implantation will be described.

Humans↗
PubMed1979

The platinum clip (Platina) intraocular lens.

The platinum clip (Platina) intraocular lens is reserved for the patient with an active mobile pupil when some type of fixation device is necessary to avoid the complication of dislocation. A surgical technique is described in which the surgeon fixates the lens with the cataract wound closed (closed-eye system), thereby allowing the procedure to be carried out safely.

Humans↗
PubMed1977

The Fyodorov intraocular lens.

The Russian-made Fyodorov intraocular lens has been inserted into one hundred eyes. The installation and the postoperative course has been no more difficult than that experienced with other types of lens, and it has not been necessary to remove any of them.

Humans↗