Results of presbyopia correction with multifocal profile application on the cornea by photorefractive keratectomy in hyperopic patients

Abstract

Purpose. To compare efficacy, safety and predictability of hyperopia and presbyopia simultaneous correction by photorefractive keratectomy (PRK) with application of a bi-aspheric multifocal profile on the cornea using PresbyMax software, and hyperopia correction by LASIK. Methods. 25 patients (50 eyes) of the 1st group were operated by PRK with bi-aspheric multifocal profile application on the cornea using PresbyMax software for simultaneous hyperopia and presbyopia correction. The 2nd group included 25 patients (50 eyes) operated by LASIK with aspheric profile application on the cornea for correction of hyperopia. Results. In the group 1, in one year after surgery, binocular distance uncorrected visual acuity (DUCVA) was 0.96 ± 0.16, near uncorrected visual acuity (NUCVA) - 0.77 ± 0.17, intermediate uncorrected visual acuity (IUCVA) - 0.64 ± 0.15. Visual acuity loss up to 0.2 was found in two eyes (4 %). Target refraction in the dominant eye - emmetropia - was obtained in 72% of patients; in 28% of cases, a shift up to -0.75 D was observed. Target refraction in the nondominant eye was found in 68% of patients, 12% of patients had a shift from target refraction of -0.50 D, and 20% of patients - of -0.75 D. Spherical aberration in 6 mm zone was -0.22 ± 0.17 µm. In group 2, in a year after surgery, binocular DUCVA was 1.0 ± 0.10, NUCVA - 0.37 ± 0.16, IUCVA - 0.43 ± 0.12. No monocular best corrected distance visual acuity loss was found. had myopia A clinical refraction shift from target one (emmetropia) of -0.50 D was established in 4% of patients. A spherical aberration in 6 mm zone was -0.10 ± 0.08 µm. Conclusion. PRK with bi-aspheric multifocal profile application unlike LASIK allows not only to achieve hyperopia correction but also to improve near visual acuity in patients of presbyopic age.

PresbyPRK vs presbyLASIK using the SUPRACOR algorithm and micromonovision in presbyopic hyperopic patients: visual and refractive results at 12 months

“…In 2017, Eskina et al reported the efficacy, predictability, and safety of presbyPRK compared with standard LASIK (nonmultifocal aspheric profile). 15 The Amaris laser PresbyMAX algorithm (Schwind eye-tech-solutions GmbH & Co. KG) was used by the authors. The addition for near vision was 1.50 D for the dominant eye and 2.30 D for the nondominant eye.…”

Analysis of the Results of Presbyopia Correction With Application of a Bi-Aspheric Multifocal Profile on the Cornea by the PRK for Patients With Myopia and Hyperopia

“…На эксимерлазерных установках серии Schwind Amaris Е500 (Германия) предусмотрено формирование анизометропии ≈0,75 Дптр. со слабой миопической рефракцией вдаль на недоминантном глазу [9].…”