Clinical Assessment of a Customized Free-form Progressive Addition Lens Spectacle (CZV_PAL1)
2017년 4월 17일 업데이트: Meng C. Lin, University of California, Berkeley
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.
연구 개요
상태
완전한
정황
상세 설명
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 questionnaires detailing their satisfaction levels, adaptation times, and preferences for Test or Control spectacles for different visual tasks.
연구 유형
중재적
등록 (실제)
95
단계
- 해당 없음
연락처 및 위치
이 섹션에서는 연구를 수행하는 사람들의 연락처 정보와 이 연구가 수행되는 장소에 대한 정보를 제공합니다.
연구 장소
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California
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Berkeley, California, 미국, 94720-2020
- Clinical Research Center, School of Optometry, University of California, Berkeley
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참여기준
연구원은 적격성 기준이라는 특정 설명에 맞는 사람을 찾습니다. 이러한 기준의 몇 가지 예는 개인의 일반적인 건강 상태 또는 이전 치료입니다.
자격 기준
공부할 수 있는 나이
39년 (성인, 고령자)
건강한 자원 봉사자를 받아들입니다
예
연구 대상 성별
모두
설명
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
공부 계획
이 섹션에서는 연구 설계 방법과 연구가 측정하는 내용을 포함하여 연구 계획에 대한 세부 정보를 제공합니다.
연구는 어떻게 설계됩니까?
디자인 세부사항
- 주 목적: 치료
- 할당: 무작위
- 중재 모델: 크로스오버 할당
- 마스킹: 더블
무기와 개입
참가자 그룹 / 팔 |
개입 / 치료 |
|---|---|
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활성 비교기: Randomized Order of Interventions 1
Randomized to first wear standard, non-free-form, non-customized PAL spectacles, then second, crossover to wear individually customized free-form surfaced PAL spectacles
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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.
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
다른 이름들:
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활성 비교기: Randomized Order of Interventions 2
Randomized to first wear individually customized free-form surfaced PAL spectacles, then second, crossover to wear 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.
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
다른 이름들:
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연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Visual Acuity, High Contrast, Distance Chart
기간: Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
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Standard assessment of high contrast visual acuity at distance, as in normal clinical practice, using Baily-Lovey charts and the M&S Technologies Smart System II visual acuity projection system.
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Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
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Visual Acuity, Low Contrast, Distance Chart
기간: Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
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Standard assessment of low contrast visual acuity at distance, as in normal clinical practice, using Baily-Lovey charts and the M&S Technologies Smart System II visual acuity projection system.
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Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
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Visual Acuity, High Contrast, Near Chart
기간: Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
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Standard assessment of high contrast visual acuity at near, as in normal clinical practice, using Baily-Lovey charts and the M&S Technologies Smart System II visual acuity projection system.
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Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
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Visual Acuity, Low Contrast, Near Chart
기간: Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
|
Standard assessment of low contrast visual acuity at near, as in normal clinical practice, using Baily-Lovey charts and the M&S Technologies Smart System II visual acuity projection system.
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Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
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30-degree Off-axis Distance Visual Acuity, High Contrast Chart
기간: Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
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Measured with subject immobilized in specially designed apparatus, keeping head pointed straight forward and moving only the eyes to left or right to view the off-axis chart
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Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
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30-degree Off-axis Distance Visual Acuity, Low Contrast Chart
기간: Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
|
Measured with subject immobilized in specially designed apparatus, keeping head pointed straight forward and moving only the eyes to left or right to view the off-axis chart
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Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
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Horizontal Extent of Undistorted Vision at Reading Distance
기간: Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
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Novel apparatus designed to immobilize head and allow subject to indicate point of peripheral optical distortion on a modified Amsler-type grid
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Post-1 week of wear of Test Spectacles and post-1 week of wear of Control Spectacles
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Questionnaire Battery
기간: At study exit, after both Test and Control spectacles had been worn for 1 week each
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Forced-choice Likert scale preference questionnaire
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At study exit, after both Test and Control spectacles had been worn for 1 week each
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공동 작업자 및 조사자
여기에서 이 연구와 관련된 사람과 조직을 찾을 수 있습니다.
수사관
- 수석 연구원: Meng C. Lin, OD, PhD, Clinical Research Center, School of Optometry, University of California, Berkeley
간행물 및 유용한 링크
연구에 대한 정보 입력을 담당하는 사람이 자발적으로 이러한 간행물을 제공합니다. 이것은 연구와 관련된 모든 것에 관한 것일 수 있습니다.
연구 기록 날짜
이 날짜는 ClinicalTrials.gov에 대한 연구 기록 및 요약 결과 제출의 진행 상황을 추적합니다. 연구 기록 및 보고된 결과는 공개 웹사이트에 게시되기 전에 특정 품질 관리 기준을 충족하는지 확인하기 위해 국립 의학 도서관(NLM)에서 검토합니다.
연구 주요 날짜
연구 시작
2009년 2월 1일
기본 완료 (실제)
2009년 10월 1일
연구 완료 (실제)
2009년 10월 1일
연구 등록 날짜
최초 제출
2010년 11월 3일
QC 기준을 충족하는 최초 제출
2010년 11월 3일
처음 게시됨 (추정)
2010년 11월 4일
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
2017년 4월 18일
QC 기준을 충족하는 마지막 업데이트 제출
2017년 4월 17일
마지막으로 확인됨
2017년 4월 1일
추가 정보
이 연구와 관련된 용어
기타 연구 ID 번호
- CZV_PAL1
이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .