Clinical Assessment of a Customized Free-form Progressive Addition Lens Spectacle

Completed · Not applicable

Conditions studied: Presbyopia

In brief

The purpose of this study was to compare objective clinical measures of visual performance and subjective measures of satisfaction and preference between standard progressive addition lens (PAL) spectacles and a new type of free-form surfaced, optically customized PAL spectacle.

Key facts

Study ID

NCT01234207

Run by

University of California, Berkeley

People needed

95

Starts

2009-02-01

Expected to finish

2009-10-01

Last updated by the study team

2017-04-18

Who can join

Age: 39 and older, up to 80. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Presbyope
• Experienced PAL spectacle wearer
• Correctable to at least 20/25 in both eyes
• Able and willing to use Test and Control spectacles for 1 week each as primary form of presbyopia correction
• Able and willing to complete all laboratory measurements and questionnaire batteries

You may not qualify if…

• Purchasing free-form PAL spectacles from the UC Berkeley Eyewear Center
• Having eye conditions or diseases that could potentially cause a decrease in visual acuity over the course of participation in the study
• Having eye conditions or diseases that could potentially interfere with ability to use Test and Control spectacles as primary form of presbyopia correction

Where it is running

• Clinical Research Center, School of Optometry, University of California, Berkeley — Berkeley, California, United States

Full record on ClinicalTrials.gov

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