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

NCT01234207 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 95

Last updated 2017-04-18

Study results available
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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) spectacles and a new type of free-form surfaced, optically customized PAL spectacle.

Conditions

Interventions

DEVICE

Standard, non-free-form, non-customized PAL spectacles

Control spectacles include several different PAL brands as selected by patients in the UC Berkeley Optometry Clinic and purchased in the Eyewear Center; after successful fitting and purchase, potential subjects were recruited for the trial.

DEVICE

Individually customized free-form surfaced PAL spectacles

Test spectacles are Zeiss Individual, free-form surfaced, and customized using the iTerminal device to account for individual back vertex distance, wrap angle and pantoscopic tilt

Sponsors & Collaborators

Principal Investigators

  • Meng C. Lin, OD, PhD · Clinical Research Center, School of Optometry, University of California, Berkeley

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Model
CROSSOVER

Eligibility

Min Age
39 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2009-02-28
Primary Completion
2009-10-31
Completion
2009-10-31

Countries

  • United States

Study Locations

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Entities

Diseases
Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01234207 on ClinicalTrials.gov