Long‐term corneal multifocal stability following a presbyLASIK technique analysed by a light propagation algorithm

Abstract

Background: There is a lack of scientific evidence on long-term follow-up of the outcomes of the presbyLASIK techniques. This study aimed to objectively evaluate corneal stability three years following excimer laser central presbyLASIK.Methods: This is a longitudinal, retrospective, observation of a consecutive series of cases comprising 24 eyes which had been treated by central myopic or hyperopic Presbymax central presbyLASIK. Eyes treated with the same version of presbyLASIK software were included and followed by corneal topography at three months, one and three years after surgery. Based on the corneal topography data, customised softwarebased on a light propagation algorithm and developed using Matlab softwarewas used to analyse the simulated behaviour of light through the ocular media. The range of objective corneal depth of focus was also measured. Results: Results were assessed separately for myopes and hyperopes at pupillary diameters of 3.0 and 6.0 mm. The results showed corneal multifocality outcomes to remain constant (p > 0.05) throughout the three-year follow-up period. Conclusion: The use of light propagation analysis of the multifocal anterior corneal surface following a Presbymax central presbyLASIK procedure demonstrated stable outcomes over a three-year follow-up period.

Exploring the Effect of Preoperative Stereopsis on Visual Outcomes in Hyperopic Presbyopes Treated with PresbyOND® Laser Blended Vision Micro-Monovision

“…Other pioneering methodologies, such as the utilization of Multifocal IOLs and laser-focused techniques like PresbyMAX and Custom-Q, have shown great promise. However, one conspicuous gap in current knowledge is the influence of preoperative visual conditions-most prominently, stereopsis-on the outcomes after surgical intervention [7]. It is important to note that hyperopic presbyopes constitute a significant segment of the population grappling with presbyopia, yet the existing literature seldom pays focused attention to them [8].…”