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O. Baca; Behavior of Posterior Elevation With Orbscan After Lasek . Invest. Ophthalmol. Vis. Sci. 2005;46(13):2760.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To evaluate the posterior elevation behavior in patients after lasek. Methods: A prospective, descriptive, longitudinal and observational study was made. All patients who underwent lasek were included. Thin and healthy corneas, refractive stability, best corrected visual acuity of 20/40 or better, myopia less than –6.00 D, astigmatism less than –3.00 D, no ocular or systemic pathology were required. Preoperative and postoperative uncorrected and best corrected visual acuity, slit lamp examination, tonometry, fundoscopy and topography at first week and one month were done. Chiron Technolas 217 was used in all patients. Lasek technique was made according to Cammelin technique. Dual maps and best sphere fit were used. Significant change was considered if the differential was higher than 50 microns. Results: Ninteen eyes of 10 patients were included. Six were female and 4 were male. The preoperative spherical equivalent was –3.35 D +/– 1.59 (range of –1.25 to –5.87). The preoperative corneal thickness in average was 488 +/– 36.12 microns (range of 422 to 555 microns). The preoperative elevation in average was 27 +/– 10 microns. The postoperative posterior elevation at first week was 85 +/– 34 microns (range of 17 to 134 microns) and at first month was 51 +/– 21 (range of 22 to 88 microns). The differential in average was 58 +/–33 microns in the first week and 26 +/– 15 microns in the first month. Conclusions: Significative changes of posterior elevation were seen in the differential map at the first week , which decreases at first month
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