Multifocal Contact Lenses for Presbyopia

This trial compares two types of daily disposable contact lenses to evaluate their effectiveness for individuals with presbyopia, a condition where eyes struggle to focus on close objects. Participants will wear Lens A (kalfilcon A) for one week, then switch to Lens B (stenfilcon A) for another week. The trial aims to determine which lens provides better vision and comfort. Ideal candidates regularly use multifocal contact lenses or glasses for reading and have done so for at least six months. As an unphased trial, it allows participants to directly compare two advanced lens options and contribute to enhancing vision solutions for presbyopia.

The trial information does not specify whether you need to stop taking your current medications. It mainly focuses on your current use of contact lenses and eye health.

A previous study found kalfilcon A, a type of silicone hydrogel contact lens, to be generally safe with no major side effects. It improved near vision without affecting distance vision, indicating its safety and effectiveness.

Reports on stenfilcon A, another type of multifocal contact lens, show that users were very satisfied and found it safe. Most eye care professionals were pleased with its performance, indicating it is well-tolerated by many people.

Researchers are excited about the multifocal contact lenses, Lens A (kalfilcon A) and Lens B (stenfilcon A), for presbyopia because they offer a fresh approach to vision correction. Unlike traditional reading glasses or monofocal contact lenses, these multifocal lenses are designed to improve near and distance vision simultaneously, potentially eliminating the need for multiple pairs of glasses. The unique materials, kalfilcon A and stenfilcon A, offer advanced comfort and moisture retention, which may enhance the overall wearing experience and encourage more consistent use. By addressing both clarity and comfort, these lenses could significantly improve quality of life for those with presbyopia.

Research has shown that multifocal contact lenses, like those tested in this trial, effectively correct presbyopia, the difficulty in seeing up close as people age. In this trial, participants will wear Lens A (kalfilcon A) and Lens B (stenfilcon A) in separate phases. Studies indicate that Lens A significantly enhances the ability to see clearly at close distances and helps people read faster compared to regular lenses. Lens B provides similar benefits, improving close-up vision while maintaining clear distance vision. Most users of these lenses achieve excellent overall vision, suggesting they effectively address presbyopia without compromising vision quality.⁴⁶⁷⁸⁹