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Evaluation of Refractive Outcomes in Patients Undergoing PRESBYOND Using the MEL90 Excimer Laser
Sponsor: Carl Zeiss Meditec AG
Summary
The goal of this clinical trial is to collect information on vision outcomes in people aged 45 to 65 who have difficulty seeing clearly at near distances due to aging (a condition called presbyopia). All participants will receive the same treatment: laser eye surgery with the PRESBYOND method using the MEL 90 excimer laser. The main questions this study aims to answer are: * How well do patients see at distance, intermediate, and near after treatment? * How satisfied are patients with their vision after surgery? Participants will: * Attend seven visits over six months (before surgery and after surgery at 1 day, 1 week, 1 month, 3 months, and 6 months) * Undergo laser eye surgery with PRESBYOND * Complete vision tests and questionnaires about their experience There is no comparison group in this study.
Key Details
Gender
All
Age Range
45 Years - 65 Years
Study Type
OBSERVATIONAL
Enrollment
75
Start Date
2025-05
Completion Date
2026-02
Last Updated
2025-05-07
Healthy Volunteers
No
Conditions
Interventions
MEL90 excimer laser - PRESBYOND
Participants will undergo laser eye surgery in both eyes using the PRESBYOND method. First, a thin flap is created on the surface of the eye using a femtosecond laser. Then, a second laser (excimer laser) reshapes the cornea to improve vision at near, intermediate, and far distances. The treatment is similar to monovision techniques, where one eye is mainly corrected for distance and the other for near vision. However, PRESBYOND differs by adjusting the depth of focus in each eye individually, allowing the brain to better combine the two images in the intermediate range-this area is called the "Blend Zone." This approach helps preserve natural binocular (3D) vision, contrast sensitivity, and depth perception. Most patients adapt well and quickly to this type of correction. The procedure is customized based on each patient's age and eye characteristics.
Locations (3)
Eye Laser Specialists
Melbourne, VIC/Australia, Australia
Crystal Eye and laser Center
Craigie, Western Australia, Australia
The Wellington Eye Centre
Wellington, New Zealand, New Zealand