Short-term tear film stability, optical quality and visual performance in two dual-focus contact lenses for myopia control with different optical designs

Article Ophthalmology

Tear film stability over a myopia control contact lens compared to a monofocal design

Jose Vicente Garcia-Marques et al.

Summary: The study found that the dual-focus contact lens design compared to the monofocal lens resulted in a slight reduction in short-term pre-lens tear film stability, potentially affecting visual performance and comfort during dual-focus contact lens wear.

CLINICAL AND EXPERIMENTAL OPTOMETRY (2022)

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Article Ophthalmology

Short-term tear film stability, optical quality and visual performance in two dual-focus contact lenses for myopia control with different optical designs

Jose Vicente Garcia-Marques et al.

Summary: This study assessed and compared the short-term visual and optical quality and tear film stability of two dual-focus prototype myopia control contact lenses with different inner zone diameters. The results showed that both lenses provided acceptable visual performance under photopic conditions. The lens with a 4.0 mm inner zone diameter had better contrast sensitivity at high frequencies and lower light disturbance.

OPHTHALMIC AND PHYSIOLOGICAL OPTICS (2022)

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Article Biology

Pre-Lens Tear Meniscus Height, Lipid Layer Pattern and Non-Invasive Break-Up Time Short-Term Changes with a Water Gradient Silicone Hydrogel Contact Lens

Raul Capote-Puente et al.

Summary: This research analyzes the tear film layer on top of contact lenses and assesses its volume, eye redness, tear film stability, and lipid quality and quantity using a non-invasive measurement technique. The results show that there were no significant changes in eye redness, a slight reduction in lipids, and no changes in tear volume. The tear breakup time was earlier with the use of the contact lens, and the blinking time was longer. Water gradient technology improved tear film stability, and Lehfilcon A material showed potential for improving tear film instability.

LIFE-BASEL (2022)

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Article Ophthalmology

Role of the Water Gradient Structure in Inhibiting Thin Aqueous Layer Break in Silicone Hydrogel-Soft Contact Lens

Hisataka Fujimoto et al.

Translational Vision Science & Technology (2021)

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Article Engineering, Biomedical

Relationships between the material properties of silicone hydrogels: Desiccation, wettability and lubricity

Petar Borisov Eftimov et al.

Summary: Silicone hydrogels (SiHy) are composite matrices designed for contact lenses, with their properties such as hydration, wettability, and lubricity needing to be optimized for use on the ocular surface. Different SiHy materials show varying performances under desiccation/rehydration cycling, with wetting agents incorporated ones being more susceptible to extended drying. There is a strong correlation between the wettability and lubricity of SiHy after at least 4 hours of blink-like cycling, providing insights for the design of novel ophthalmic materials.

JOURNAL OF BIOMATERIALS APPLICATIONS (2021)

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Article Biochemistry & Molecular Biology