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The article details the development of a process for obtaining simulations of various contact lens designs from different manufacturers through in-vitro measurements using a commercial device and computational characterization, as well as the validation of the simulations obtained with volunteers. The results of the simulations obtained using this method show good agreement compared to real contact lenses, confirming the validity of the method and the simulations, presenting potential to accelerate the sometimes complicated adaptation to multifocal contact lenses.

The article details the development of a process for obtaining simulations of various contact lens designs from different manufacturers through in-vitro measurements using a commercial device and computational characterization, as well as the validation of the simulations obtained with volunteers. The results of the simulations obtained using this method show good agreement compared to real contact lenses, confirming the validity of the method and the simulations, presenting potential to accelerate the sometimes complicated adaptation to multifocal contact lenses.
Presbyopia, commonly known as the loss of the ability to focus correctly at close distances due to the loss of elasticity of the crystalline lens, gradually affects all people from approximately 45 years of age, until over the years the ability to focus vision is completely lost.
To correct this problem, various correction strategies have been developed, such as glasses, intraocular lenses and also contact lenses. However, very few people choose to use multifocal contact lenses when they become presbyopic. This can be attributed to several factors, such as lack of information about multifocal solutions, unexpected visual performance, and a prolonged adaptation process to the lenses.
To address this situation, visual simulators such as the one used in this study have emerged as a tool capable of improving the adaptation process and helping patients to know what their vision will be like with different multifocal contact lens designs before ordering and trying them on, thus reducing waiting time.
In this study, simulation of daily soft multifocal contact lenses from four commercial brands was carried out using a visual simulator called SimVis Gekko (2EyesVision SL, Spain). The main objective of this study is to achieve accurate simulations of multifocal contact lenses and validate their effectiveness with a group of volunteers by comparing them with real contact lenses.
Using a specialized commercial device to obtain the real power of a contact lens through its surface and dedicated computational algorithms, the phase maps of the commercial contact lens design were reconstructed and their visual quality metrics were also calculated, in order to simulate them in volunteers, using the SimVis Gekko device.
“Visual simulators can help patients understand what their vision would be like with different multifocal contact lens designs in a single session, allowing professionals to recommend the most appropriate option taking into account the patient’s visual needs and expectations, thus improving the process,” explains Eduardo Esteban Ibáñez, lead author of the article.
In the future, the team plans to carry out a project including more contact lens designs, replicating all the steps of the fitting guides offered by commercial houses and optimizing the adaptation process. In this way, the aim is to find the optimal pair of multifocal contact lenses for each patient in the shortest possible time.

Article: Eduardo Esteban-Ibañez, Diego Montagud-Martínez, Lucie Sawides, Amal Zaytouny, Alberto de Castro, Irene Sisó-Fuertes, Xoana Barcala, David P. Piñero, Walter D. Furlan, Carlos Dorronsoro & Enrique Gambra. ” Simulation of daily soft multifocal contact lenses using SimVis Gekko: from in-vitro and computational characterization to clinical validation “. Scientific Reports (2024)

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