Status:
COMPLETED
Clinical Assessment of a Customized Free-form Progressive Addition Lens Spectacle
Lead Sponsor:
University of California, Berkeley
Collaborating Sponsors:
Carl Zeiss Meditec, Inc.
Conditions:
Presbyopia
Eligibility:
All Genders
39-80 years
Phase:
NA
Brief Summary
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) spect...
Detailed Description
In a double-masked crossover trial, 95 experienced wearers wore customized free-form PAL spectacles (Test) and standard non-free-form PAL spectacles (Control) for one week each. All subjects wore both...
Eligibility Criteria
Inclusion
- 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
Exclusion
- 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
Key Trial Info
Start Date :
February 1 2009
Trial Type :
INTERVENTIONAL
Allocation :
ACTUAL
End Date :
October 1 2009
Estimated Enrollment :
95 Patients enrolled
Trial Details
Trial ID
NCT01234207
Start Date
February 1 2009
End Date
October 1 2009
Last Update
April 18 2017
Active Locations (1)
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1
Clinical Research Center, School of Optometry, University of California, Berkeley
Berkeley, California, United States, 94720-2020