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Updated: Jul 5, 2026
05:46
Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile
Published on: September 20, 2024
Pseudoaccommodation and visual acuity with Technovision presbyLASIK and a theoretical simulated Array multifocal
Carlos Illueca1, Jorge L Alió, David Mas
1Department of Optics, Universidad de Alicante, Alicante, Spain.
Summary
PresbyLASIK offers visual acuity comparable to simulated multifocal intraocular lenses (IOLs), though near vision performance slightly decreases compared to the ideal multifocal IOL. This study compares presbyLASIK outcomes to theoretical IOL models.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Optical Engineering
Background:
- Presbyopia correction aims to restore near and distance vision.
- Multifocal intraocular lenses (IOLs) and laser-assisted in situ keratomileusis (LASIK) are common surgical options.
- Evaluating refractive surgery outcomes against theoretical models provides valuable insights.
Purpose of the Study:
- To compare visual outcomes of presbyLASIK with theoretical pseudoaccommodation from a simulated multifocal IOL.
- To assess the optical quality and visual acuities achieved with presbyLASIK.
- To benchmark presbyLASIK against an ideal multifocal IOL model (simulated AMO Array).
Main Methods:
- 10 hyperopic eyes underwent central presbyLASIK using a Technovision excimer laser.
- Objective visual acuities (distance and near) were calculated using a Fresnel propagation algorithm.
- PresbyLASIK results were compared to a simulated Array multifocal IOL substituted for the crystalline lens.
Main Results:
- For near vision (25 cm to 1 m), the simulated Array IOL provided acuity >0.5, while presbyLASIK performed well beyond 45 cm.
- For distance vision (1.5 to 6 m), both presbyLASIK and the simulated IOL achieved acuity >0.5.
- PresbyLASIK demonstrated slightly superior optical performance for distance vision compared to the ideal Array-like lens.
Conclusions:
- PresbyLASIK visual acuity is comparable to the best theoretical visual acuity from a simulated Array multifocal IOL.
- Near visual acuity with presbyLASIK shows a decline compared to the ideal theoretical multifocal IOL.
- The study provides a comparative analysis of presbyLASIK and multifocal IOL optical performance.
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