Monovision LASIK in emmetropic presbyopic patients

Peng, Ming-Yieh; Hannan, Stephen J.; Teenan, David; Schallhorn, Steve; Schallhorn, Julie M.

doi:10.2147/opth.s170759

Cited by 11 publications

(5 citation statements)

References 23 publications

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“…One characteristic difference between LBV and the simple monovision design was the blended vision achieved by SA induction [20] . In our study, 70% of the patients achieved 20/20 or better binocular distance vision as well as near vision, which was inferior than the monovision design [9] . We speculate that patients' baseline characteristics may partly explain the results.…”

Section: Discussioncontrasting

confidence: 49%

“…Monovision is probably the most mature, albeit still popular, approach in presbyopia correction. Several studies have demonstrated its successful application in laser in situ keratomileusis (LASIK) and small-incision lenticule extraction (SMILE) [8][9] . However, traditional monovision approaches may induce diminished contrast sensitivity and stereoacuity [10][11] .…”

Section: Introductionmentioning

confidence: 99%

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Refractive outcomes and optical quality of PRESBYOND laser-blended vision for presbyopia correction

Fu¹,

Xu²,

Han³

et al. 2022

Int J Ophthalmol

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AIM: To investigate the one-year refractive outcomes and optical quality following PRESBYOND laser-blended vision (LBV). METHODS: This retrospective study included 20 patients who underwent PRESBYOND treatment between Jan 2019 and Aug 2020. The patients were asked to attend a follow-up outpatient visit one year after surgery. Distance and near visual acuity as well as subjective refraction were examined. Optical quality was assessed using wavefront-supported custom ablation. A questionnaire evaluating optical quality and satisfaction was completed at the last visit. RESULTS: The average patient age was 48.1±7.4y (range, 41 to 58y). The mean preoperative spherical equivalent was -7.59±2.39 D. At the one-year follow-up, two eyes (both dominant eyes) lost one line of corrected distance visual acuity (CDVA), while the remaining eyes (38/40) maintained or gained lines of CDVA. The average binocular uncorrected distance visual acuity improved from 0.15±0.03 to 0.90±0.26 (decimal vision; P<0.001). The average binocular uncorrected near visual acuity increased from 0.34±0.28 to 0.97±0.07 (P<0.001). The spherical aberration was 0.04±0.06 μm in the nondominant eye and 0.09±0.09 μm in the dominant eye (P=0.02). All patients were satisfied with or accepted the outcomes of the surgery. The primary complaints were related to disturbances in night vision and relatively inferior near vision. CONCLUSION: Over the one-year observation period, PRESBYOND is a safe and effective option for presbyopia correction. The optical quality and near vision deserve further investigation.

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Section: Discussioncontrasting

confidence: 49%

Section: Introductionmentioning

confidence: 99%

Refractive outcomes and optical quality of PRESBYOND laser-blended vision for presbyopia correction

Fu¹,

Xu²,

Han³

et al. 2022

Int J Ophthalmol

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show abstract

“…In this technique, the patient selection is less crucial [ 20 ], but the non-dominant eye has a drastic decrease in far vision, and stereoscopic vision is impacted [ 21 ]. Therefore, up to 15% of patients who undergo monovision LASIK may be dissatisfied [ 22 ]. Second, we could not compare our patient population to patients who had multifocal lens implantation.…”

Section: Discussionmentioning

confidence: 99%

Multifocal Femto-PresbyLASIK in Pseudophakic Eyes

Pajic

Massa

Baenninger

et al. 2021

JCM

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Background: Presbyopia treatment in pseudophakic patients with a monofocal IOL is challenging. This study investigates the refractive results of femto-PresbyLASIK and analyzes presbyopia treatment in pseudophakic eyes. Methods: 14 patients with 28 pseudophakic eyes were treated with femto-PresbyLASIK. The dominant eye was targeted at a distance and the non-dominant eye at −0.5 D. The presbyopic algorithm creates a steepness in the cornea center by using an excimer laser that leads to corneal multifocality. Results: 6 months after surgery a refraction of −0.11 ± 0.13 D (p = 0.001), an uncorrected distance visual acuity of 0.05 ± 1.0 logMAR (p < 0.001) and an uncorrected near visual acuity of 0.15 ± 0.89 logMAR (p = 0.001) were achieved in the dominant eye. For the non-dominant eye, the refraction was −0.28 ± 0.22 D (p = 0.002), the uncorrected distance of visual acuity was 0.1 ± 1.49 logMAR, and the uncorrected near visual acuity was 0.11 ± 0.80 logMAR (p < 0.001). Spherical aberrations (Z400) were reduced by 0.21–0.3 µm in 32% of eyes, and by 0.31–0.4 µm in 26% of eyes. Conclusion: By steepening the central cornea while maintaining spherical aberrations within acceptable limits, PresbyLASIK created a corneal multifocality that safely improved near vision in both eyes. Thus, femto-PresbyLASIK can be used to treat presbyopia in pseudophakic eyes without performing intraocular surgery.

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“…Despite the advantages of the above-mentioned techniques, post-operative healing and complications are of serious concern and are extensively studied. There are cases in which patients develop post-operative stromal haze, optical side effects such as glare and halos, , and discomfort . Experts suggest that they are likely arising from the disruption of the epithelial–stromal interface, , myofibroblast differentiation, , and wound-healing associated remodeling .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Ablation of Cornea Doped with a Fluorescein Dye Using a Visible Wavelength Laser

Sanjeev

Trivedi

Sterkin³

et al. 2023

ACS Omega

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Myopia (nearsightedness) and presbyopia (aging eye) are the most common refractive errors of the human eye. Technology has advanced toward correcting aberration using various surgical procedures, including laser surgery, as well as prescribing corrective lenses. Hence, the effect of various laser wavelengths on the eye has been extensively studied over the last few decades. Usually, excimer lasers are used for this purpose, which increases the cost of the procedure because they are unique and difficult to manufacture and require regular maintenance. Due to the absorption properties, visible wavelengths do not interact with the corneal layers and hence are currently not used for eye surgery. This study presents the first clinical evidence that a 532 nm laser in combination with an eye-safe fluorescein dye that is in wide clinical use in ophthalmology can be utilized for high-precision ablation purposes due to the photochemical reaction that occurs on an ex vivo porcine eye. Our results show the promise of utilizing inexpensive visible wavelength lasers in the ablation of biological tissues, reducing the high costs of ophthalmological surgical procedures, as well as in other applications.

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Monovision LASIK in emmetropic presbyopic patients

Cited by 11 publications

References 23 publications

Refractive outcomes and optical quality of PRESBYOND laser-blended vision for presbyopia correction

Refractive outcomes and optical quality of PRESBYOND laser-blended vision for presbyopia correction

Multifocal Femto-PresbyLASIK in Pseudophakic Eyes

Enhanced Ablation of Cornea Doped with a Fluorescein Dye Using a Visible Wavelength Laser

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