Dehydration and physicochemical changes in myopia control contact lenses: influence of material and maintenance solutions
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E-ISSN: 1476-5411
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Elsevier
Abstract
Objetivo
Evaluar la tasa de deshidratación en diferentes lentes de contacto (LC) para el control de la miopía y los cambios fisicoquímicos que se producen tras la exposición a distintas soluciones de mantenimiento.
Métodos
Primero, se evaluó la tasa de deshidratación de las LC y su impacto en el índice de refracción y el diámetro en tres modelos de LC para el control de la miopía (MiSight 1 Day, Bloom Day y MYLO). Las mediciones se realizaron inmediatamente después de extraer la LC del blíster y a intervalos de 5 minutos durante un período de 30 minutos. En segundo lugar, se evaluó el efecto de diferentes soluciones de mantenimiento sobre las propiedades fisicoquímicas de las LC mensuales para el control de la miopía (MYLO) con diferentes diámetros. Se midieron el índice de refracción, el contenido de agua, el diámetro, la hidrofobicidad superficial de la lente y las propiedades mecánicas dinámicas inmediatamente después de extraer la LC del blíster y tras 12 horas de inmersión en cada una de las tres soluciones de mantenimiento estudiadas (Hidro Health HA, OPTI-Free PureMoist y Biotrue).
Resultados
La tasa de deshidratación mostró diferencias significativas entre las LC analizadas, siendo las LC de reemplazo diario (MiSight 1 Day y Bloom Day) las que presentaron una deshidratación más rápida y, en consecuencia, el cambio más significativo en el índice de refracción. En contraste, las LC MYLO mostraron la mayor reducción en el diámetro. Al evaluar el impacto de las soluciones de mantenimiento sobre las propiedades de las MYLO, se observaron cambios en todos los parámetros evaluados, excepto en las propiedades mecánicas. Estos cambios variaron en función de la solución de mantenimiento utilizada y del diámetro de la LC.
Conclusión
Las LC para el control de la miopía pueden sufrir deshidratación y alteraciones debido a las soluciones empleadas para su cuidado, lo cual puede afectar significativamente sus propiedades fisicoquímicas, el rendimiento de la lente, la comodidad y la estabilidad. Por tanto, se debe prestar especial atención a las propiedades del material de la LC y de las soluciones de mantenimiento para optimizar la experiencia del usuario y garantizar un comportamiento consistente de la lente a lo largo del tiempo.
Purpose To assess the dehydration rate in different myopia control contact lenses (CLs) and the physicochemical changes that occur after exposure to different maintenance solutions. Methods First, the dehydration rate of CLs and its impact on refractive index and diameter were evaluated in three myopia control CLs models (MiSight 1 Day, Bloom Day, and MYLO). Measurements were taken immediately after the CL was removed from the blister and at 5-min intervals over a 30-min period. Second, the effect of different maintenance solutions on the physicochemical properties of monthly replacement myopia control CLs (MYLO) with different diameters were assessed. Refractive index, water content, diameter, lens surface hydrophobicity, and dynamic mechanical properties were measured immediately after the CL was removed from the blister and again after 12 h of immersion in each of the three maintenance solutions studied (Hidro Health HA, OPTI-Free PureMoist and Biotrue). Results The dehydration rate exhibited significant disparities among the CLs examined, with daily replacement CLs (MiSight 1 Day and Bloom Day) demonstrating the fastest dehydration and, consequently, the most significant change in refractive index. In contrast, MYLO CLs exhibited the greatest reduction in diameter. When assessing the impact of maintenance solutions on MYLO properties, changes were observed in all evaluated parameters, except for mechanical properties. These changes varied depending on the maintenance solution used and the diameter of CL. Conclusion Myopia control CLs can undergo dehydration and changes due to the solutions used for their care, which may significantly affect their physicochemical properties, lens performance, comfort, and stability. Therefore, careful consideration should be given to the properties of the CL material and the maintenance solutions properties to optimize the user experience and ensure consistent lens behavior over time.
Purpose To assess the dehydration rate in different myopia control contact lenses (CLs) and the physicochemical changes that occur after exposure to different maintenance solutions. Methods First, the dehydration rate of CLs and its impact on refractive index and diameter were evaluated in three myopia control CLs models (MiSight 1 Day, Bloom Day, and MYLO). Measurements were taken immediately after the CL was removed from the blister and at 5-min intervals over a 30-min period. Second, the effect of different maintenance solutions on the physicochemical properties of monthly replacement myopia control CLs (MYLO) with different diameters were assessed. Refractive index, water content, diameter, lens surface hydrophobicity, and dynamic mechanical properties were measured immediately after the CL was removed from the blister and again after 12 h of immersion in each of the three maintenance solutions studied (Hidro Health HA, OPTI-Free PureMoist and Biotrue). Results The dehydration rate exhibited significant disparities among the CLs examined, with daily replacement CLs (MiSight 1 Day and Bloom Day) demonstrating the fastest dehydration and, consequently, the most significant change in refractive index. In contrast, MYLO CLs exhibited the greatest reduction in diameter. When assessing the impact of maintenance solutions on MYLO properties, changes were observed in all evaluated parameters, except for mechanical properties. These changes varied depending on the maintenance solution used and the diameter of CL. Conclusion Myopia control CLs can undergo dehydration and changes due to the solutions used for their care, which may significantly affect their physicochemical properties, lens performance, comfort, and stability. Therefore, careful consideration should be given to the properties of the CL material and the maintenance solutions properties to optimize the user experience and ensure consistent lens behavior over time.
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https://doi.org/10.1016/j.clae.2025.102478Sponsors
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© 2025 The Authors. Published by Elsevier Ltd on behalf of British Contact Lens Association. This is an open access article under the CC BY-NC-ND license. Attribution-NonCommercial-NoDerivatives 4.0 International








