Assessment of Three Basic Progressive Lens Designs

Completed · Not applicable

Conditions studied: Presbyopia

In brief

This clinical trial investigates the differences between three different progressive addition lens designs. It is a non-invasive double-masked randomized clinical investigation. For this study, 80 participants will be recruited.

Key facts

Study ID: NCT05252871
Run by: Western University of Health Sciences
People needed: 80
Starts: 2021-12-09
Expected to finish: 2022-06-06
Last updated by the study team: 2024-08-15

Who can join

Age: 45 and older, up to 70. Sex: any. Healthy volunteers: accepted.

You may qualify if…

Age: 45 to 70 years old.
Visual Acuity: far \& near monocular: cc ≥ 20/20 (decimal cc ≥ 1.0)
Normal binocular vision (at distance \& near: no strabismus on cover testing, aligning prism of less than 2Δ horizontally or vertically, stereoacuity of 2' or better at distance and near).
Prescription is in the range:
Spherical power: less than +/-6.00 D
Cylindrical power: less than -2.75 D
Addition: 1.50 D - 2.50 D
Difference in power (spherical equivalent) between eyes: less than 2.00 D

You may not qualify if…

Have never worn any progressive lens design.
First prescription for progressive lenses.
Prescription found during visit#1 varies from current prescription more than 0.50 D in any meridian.
Currently wearing single vision lenses with accommodative support.
Double vision or prismatic prescription in current glasses.
Known ocular disease including strabismus, any pathology, any eye surgeries that may affect visual acuity.
Use of systemic or ocular medications that are likely to affect vision.
Balance problem/vertigo problem.
Concurrent participation in other vision-related research.

Where it is running

Western University of Health Sciences — Pomona, California, United States

Full record on ClinicalTrials.gov

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