Journal of refractive surgery (Thorofare, N.J. : 1995) · 2016
LASIK for Hyperopia Using an Aberration-Neutral Profile With an Asymmetric Offset Centration.
СтатьяНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
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Ошибки и ограничения
История · было → стало
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Arba-Mosquera Samuel, de Ortueta Diego
Аннотация
PURPOSE: To investigate refractive outcomes and induction of corneal higher order aberrations (HOAs) in eyes with large pupil to corneal vertex offset that underwent LASIK for hyperopia using an aberration-neutral profile with corneal vertex centration and asymmetric offset.
METHODS: In this retrospective consecutive review, 26 patients (46 eyes) who underwent LASIK performed by one surgeon using the AMARIS 750S excimer laser platform and Carriazo-Pendular microkeratome (both from SCHWIND eye-tech-solutions, Kleinostheim, Germany) for flap creation were retrospectively analyzed. Only eyes targeted for plano and with a pupil to corneal vertex offset greater than 200 µm were included. The preoperative metrics were correlated with the outcomes at 3 and 6 months postoperatively.
RESULTS: The mean spherical equivalent was +3.43 ± 1.30 diopters (D) preoperatively and +0.21 ± 0.61 D at last postoperative visit (P < .0001). Mean refractive astigmatism was 1.09 ± 1.06 D preoperatively, and 0.39 ± 0.43 D at last postoperative visit. Postoperative uncorrected distance visual acuity of 20/25 or better was achieved in 74%, 65%, and 79% of eyes at 1, 3, and 6 months, respectively, compared to 85% corrected distance visual acuity of 20/25 or better preoperatively. Statistically significant correlation was observed between preoperative and postoperative aberration values for vertical trefoil (P < .0005), vertical coma (P < .0005), oblique tetrafoil (P < .0001), secondary cardinal astigmatism (P < .05), cardinal tetrafoil (P < .05), and secondary vertical trefoil (P < .05).
CONCLUSIONS: LASIK for high levels of hyperopia using corneal vertex centration with asymmetric offset was safe and predictable. Maintaining postoperative keratometry less than 49.00 D after hyperopic LASIK and centering on corneal vertex may reduce the induction of coma compared to other profiles or centration strategies.
METHODS: In this retrospective consecutive review, 26 patients (46 eyes) who underwent LASIK performed by one surgeon using the AMARIS 750S excimer laser platform and Carriazo-Pendular microkeratome (both from SCHWIND eye-tech-solutions, Kleinostheim, Germany) for flap creation were retrospectively analyzed. Only eyes targeted for plano and with a pupil to corneal vertex offset greater than 200 µm were included. The preoperative metrics were correlated with the outcomes at 3 and 6 months postoperatively.
RESULTS: The mean spherical equivalent was +3.43 ± 1.30 diopters (D) preoperatively and +0.21 ± 0.61 D at last postoperative visit (P < .0001). Mean refractive astigmatism was 1.09 ± 1.06 D preoperatively, and 0.39 ± 0.43 D at last postoperative visit. Postoperative uncorrected distance visual acuity of 20/25 or better was achieved in 74%, 65%, and 79% of eyes at 1, 3, and 6 months, respectively, compared to 85% corrected distance visual acuity of 20/25 or better preoperatively. Statistically significant correlation was observed between preoperative and postoperative aberration values for vertical trefoil (P < .0005), vertical coma (P < .0005), oblique tetrafoil (P < .0001), secondary cardinal astigmatism (P < .05), cardinal tetrafoil (P < .05), and secondary vertical trefoil (P < .05).
CONCLUSIONS: LASIK for high levels of hyperopia using corneal vertex centration with asymmetric offset was safe and predictable. Maintaining postoperative keratometry less than 49.00 D after hyperopic LASIK and centering on corneal vertex may reduce the induction of coma compared to other profiles or centration strategies.