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

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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.


Erika N Eskina

Author for correspondence.
erika.eskina@sfe.ru
Institute of professional development of the Federal Medical and Biological Agency
Russian Federation, Moscow, Russia

MD, PhD, DMedSc, professor. Ophthalmology Department

Victoria A Parshina

vparshina@sfe.ru
Institute of professional development of the Federal Medical and Biological Agency
Russian Federation, Moscow, Russia

MD, ophthalmologist, postgraduate researcher

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