ArticleBioengineering (Basel, Switzerland)2019
Simulation of the Effect of Material Properties on Soft Contact Lens On-Eye Power.
Article in Bioengineering (Basel, Switzerland), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 15 citations in OpenAlex.
- The Behaviour of Contaflex Soft Contact Lens Material During Hydration.Gels (Basel, Switzerland) · 2025Article
- Influence of Contact Lens Parameters on Cornea: Biomechanical Analysis.Bioengineering (Basel, Switzerland) · 2024Article
- Contact lens fitting and changes in the tear film dynamics: mathematical and computational models review.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2024Review
- FEA-Based Stress-Strain Barometers as Forecasters for Corneal Refractive Power Change in Orthokeratology.Bioengineering (Basel, Switzerland) · 2024Article
- Biomechanical evaluation of different plunger size and plunger position on removing soft contact lenses and rigid gas permeable contact lenses.Technology and health care : official journal of the European Society for Engineering and Medicine · 2024Article
- Advances in Therapeutic Contact Lenses for the Management of Different Ocular Conditions.Journal of personalized medicine · 2023Review
- Article
- Finite Element Analysis of Cornea and Lid Wiper during Blink, with and without Contact Lens.Journal of ophthalmology · 2022Article
- Article
- Compressive behaviour of soft contact lenses and its effect on refractive power on the eye and handling off the eye.PloS one · 2021Article
- Which feature influences on-eye power change of soft toric contact lenses: Design or corneal shape?PloS one · 2020Article
Corrections and comments
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Authors and funding
8 authors at 3 institutions in 5 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeTo evaluate the variation in the optical power achieved following soft contact lens eye fitting for spherical and cylindrical lenses with differing hydrogel material properties.
methodsUniaxial tensile tests were performed on four hydrogel materials 77% water-content (w-c) hydrogel, 74% w-c blue silicone hydrogel, 74% w-c clear silicone hydrogel, and 64% w-c clear hydrogel (shortly referred to as H77p0, SiH74p5-blue, SiH74p5-clear, and H64p0-clear), under loading conditions that would be expected in vivo. Finite element models of the cornea and contact lens interaction were generated using spherical and cylindrical lenses with powers varying from -10 to +20 D; overall diameters of either 13.5, 14.0, or 14.5 mm; and with material properties matching those determined through experimental testing.
resultsThe moduli of elasticity for each of the tested hydrogel materials were 0.195 ± 0.027 MPa, 0.277 ± 0.019 MPa, 0.279 ± 0.01 MPa, and 0.457 ± 0.013 MPa for H77p0, SiH74p5-blue, SiH74p5-clear, and H64p0 respectively. The calculated values of effective power change (EPC) showed strong negative correlations with lens power. This was particularly apparent in the higher end of the lens power spectrum (over +5 D), where each of the materials demonstrated a highly linear reduction in EPC with increased lens power.
conclusionsSoft contact lenses composed of a stiffer hydrogel are far more resilient to changes in EPC across the lower end of the lens power spectrum (-10 to +5 D). Beyond this range, the material choice does not have a significant effect on the EPC.
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