Clinical Assessment of a Customized Free-form Progressive Addition Lens Spectacle
Launched by UNIVERSITY OF CALIFORNIA, BERKELEY · Nov 3, 2010
Trial Information
Current as of July 23, 2025
Completed
Keywords
ClinConnect Summary
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 Test and Control spectacles, and the pair to be worn first was randomly assigned. At dispensing and after 1 week of wear, subjects were tested for distance and near visual acuity (VA) under both high and low contrast; in addition, 30 degree off-axis VA was measured using a novel apparatus, as was the horizontal extent of undistorted vision at reading distance. Subjects also completed a set of ...
Gender
ALL
Eligibility criteria
- Inclusion Criteria:
- • 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 Criteria:
- • 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
About University Of California, Berkeley
The University of California, Berkeley, a leading research institution renowned for its commitment to scientific innovation and academic excellence, serves as a prominent sponsor of clinical trials aimed at advancing medical knowledge and improving patient outcomes. With a robust infrastructure for interdisciplinary collaboration, UC Berkeley leverages its distinguished faculty, cutting-edge laboratories, and extensive resources to conduct research that addresses critical health challenges. The university is dedicated to fostering a culture of ethical research practices and ensuring the highest standards of safety and efficacy in its clinical investigations, ultimately contributing to the translation of scientific discoveries into tangible health solutions.
Contacts
Jennifer Cobb
Immunology at National Institute of Allergy and Infectious Diseases (NIAID)
Locations
Berkeley, California, United States
Patients applied
Trial Officials
Meng C. Lin, OD, PhD
Principal Investigator
Clinical Research Center, School of Optometry, University of California, Berkeley
Timeline
First submit
Trial launched
Trial updated
Estimated completion
Not reported
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