Instituto de Óptica “Daza de Valdés”

Perceptual cost and benefit of presbyopia-correcting intraocular lenses: effect of energy balance, addition, and adaptation

Perceptual cost and benefit of presbyopia-correcting intraocular lenses: effect of energy balance, addition, and adaptation

VioBio-en

  • The study shows that the subject’s response to the different lenses is influenced by the adaptation process that precedes each test.
  • The neural mechanisms underlying the visual processing of different images, provided by these corrections, are still not fully understood.
Madrid / March 21, 2025

A team of researchers from the Daza de Valdés Optics Institute and the company 2EyesVision has published a pioneering study in the journal Biomedical Optics Express about their experiments on the perception of bifocal intraocular lenses (IOLs) used to correct presbyopia. The work explores how optical power distribution and addition in bifocal lenses influence the visual quality perceived by patients, both at far and near distances. Using the SimVis Gekko visual simulator, the researchers have demonstrated that in simulation tests of different lenses, prior preparation is important to significantly improve the acceptance of multifocal lenses. This study offers valuable tools for lens designers and clinicians to optimize the adoption of these visual solutions.

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Presbyopia is an age-related vision problem that affects the eye’s ability to focus on near objects, leading to an increasing dependence on glasses or contact lenses. One of the most advanced solutions for correcting it is multifocal intraocular lenses, which distribute light across different focal points to provide vision at different distances. However, this technology entails a perceptual compromise, as the superposition of sharp and blurred images in the eye affects perceived visual quality. In this context, the published study examines how the distribution of energy between near and distance vision, the level of optical addition, and the visual adaptation process influence the user experience, with the aim of optimizing their design and improving their clinical acceptance.
An eye with an intraocular lens receives simultaneously focused images of a nearby mobile phone and a distant car.
To conduct the study, the researchers used the SimVis Gekko visual simulator, a technology developed by 2EyesVision that realistically replicates the effect of different intraocular lenses without the need for surgical implantation. Using this system, they evaluated the visual perception of a group of volunteers by exposing them to different bifocal lens configurations, varying the energy distribution between distance and near focal points, as well as the time and type of transition between optical corrections. They also analyzed the impact of prior visual adaptation, comparing the participants’ response after being exposed to sharp or blurred images. This methodology made it possible to quantify the perceived advantages and disadvantages of each lens configuration, providing key information for improving the design and customization of these ophthalmic solutions.

Article: Eduardo Esteban-Ibañez, Enrique Gambra, Yassine Marrakchi, Lucie Sawides, and Carlos Dorronsoro “Perceptual cost and benefit of presbyopia-correcting intraocular lenses: effect of energy balance, addition, and adaptation.” Biomedical Optics Express Vol. 16, Issue 2, pp. 849-871 (2025)

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