Accommodation Disorders
AD
Using Accommodative Lag to Diagnose Accommodation Disorders
1 other identifier
observational
83
1 country
1
Brief Summary
This project will develop clinically useful, objective measurements of accommodative insufficiency and fatigue using continuous autorefraction recordings. The development of these procedures will help vision care professionals diagnose and treat accommodative anomalies.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P50-P75 for all trials
Started Dec 2010
Typical duration for all trials
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
Study Start
First participant enrolled
December 1, 2010
CompletedFirst Submitted
Initial submission to the registry
April 4, 2011
CompletedFirst Posted
Study publicly available on registry
April 6, 2011
CompletedPrimary Completion
Last participant's last visit for primary outcome
December 1, 2012
CompletedStudy Completion
Last participant's last visit for all outcomes
August 1, 2013
CompletedResults Posted
Study results publicly available
January 5, 2015
CompletedJanuary 5, 2015
December 1, 2014
2 years
April 4, 2011
December 8, 2014
December 23, 2014
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Accommodation Lag 5D
Lag will be measured at different viewing distances and durations using autorefraction. Accommodation error refers to the difference between the distance where the target is located and where the eyes focus. Lag refers error that is under focussed; lead is error that is over focussed. This distance is measured in diopters, or 1/meter.
3 week period
Secondary Outcomes (1)
Conlon Symptom Survey
3 weeks
Study Arms (1)
discomfort symptoms
level of discomfort symptoms while performing near work
Eligibility Criteria
Graduate students from Western University of Health Sciences
You may qualify if:
- older adolescent and young adult
- skilled readers who attend school
- are skilled readers
- have heavy reading demands
You may not qualify if:
- Age \> 30.
- Abnormal vergence system.
- Dry-eye.
- Uncorrected visual defects or significant ocular pathology.
- Learning disability or low IQ
- Medical conditions that might cause uncomfortable visual symptoms (e.g., migraine headaches, epilepsy, head trauma); sensory defects (e.g., deafness), or neurological conditions (e.g., stuttering) that could impair reading development or oral reading fluency.
- Somatosensory amplification.
- Systemic illness or medication associated with accommodative dysfunction.
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Western University of Health Sciences
Pomona, California, 91766, United States
Results Point of Contact
- Title
- Dr. Chris Chase
- Organization
- Western University of Health Sciences
Study Officials
- PRINCIPAL INVESTIGATOR
Chris Chase, PhD
Western University of Health Sciences
Publication Agreements
- PI is Sponsor Employee
- Yes
Study Design
- Study Type
- observational
- Observational Model
- COHORT
- Time Perspective
- PROSPECTIVE
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Professor of Optometry
Study Record Dates
First Submitted
April 4, 2011
First Posted
April 6, 2011
Study Start
December 1, 2010
Primary Completion
December 1, 2012
Study Completion
August 1, 2013
Last Updated
January 5, 2015
Results First Posted
January 5, 2015
Record last verified: 2014-12