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Comprehensive Evaluation of Visual Function

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified May 2009 by The Chicago Lighthouse for People Who Are Blind or Visually Impaired.
Recruitment status was:  Recruiting
Ophthonix Inc
University of Illinois at Chicago
Information provided by:
The Chicago Lighthouse for People Who Are Blind or Visually Impaired Identifier:
First received: May 4, 2009
Last updated: May 5, 2009
Last verified: May 2009
The purpose of this study is to assess the level of visual functioning in patients with various eye conditions while wearing different types of eyeglasses.

Condition Intervention
Visual Function
Device: Izon Wavefront-guided lenses
Device: Conventional lenses

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator)
Primary Purpose: Treatment
Official Title: Comprehensive Evaluation of Visual Function

Resource links provided by NLM:

Further study details as provided by The Chicago Lighthouse for People Who Are Blind or Visually Impaired:

Primary Outcome Measures:
  • Visual Acuity, and Contrast Sensitivity [ Time Frame: Once a week ]

Estimated Enrollment: 300
Study Start Date: February 2009
Estimated Study Completion Date: December 2009
Estimated Primary Completion Date: October 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Wavefront guided lenses Device: Izon Wavefront-guided lenses
Subjects will use prescribed eyeglasses for one week. Their visual functioning will be tested at the end of the week.
Placebo Comparator: Conventional lenses Device: Conventional lenses
We will test the subjects with these lenses after they have worn them for one week. Same procedures will be followed as with the other lenses.

Detailed Description:
The purpose of the research is to study the level of visual functioning in individuals with various eye conditions when using different types of eyeglass lenses. Therefore, the goal of this study is to determine factors that may account for variability in the visual functioning of individuals with a range of refractive errors and their ability to perform everyday activities when equipped with different types of lenses. We hypothesize that the subjects will perform visual tasks of function better when using iZon™ Wavefront-Guided Glasses than with conventional glasses. This hypothesis is based upon the glasses yielding better visual acuity and because the design of the glasses reduces the effects of glare. This research is important so that alternate treatments and vision correction may be implemented which will have a more beneficial impact on those with refractive errors and visual impairment.

Ages Eligible for Study:   18 Years to 35 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Have normal vision
  • Are far-sighted or near-sighted
  • Have no eye diseases Subjects aged 18 and over, who have refractive errors ranging from +5.0 to -5.0 and/or who have eye disease will be included in the study.
  Contacts and Locations
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Please refer to this study by its identifier: NCT00894192

United States, Illinois
The Chicago Lighthouse
Chicago, Illinois, United States, 60608
Sponsors and Collaborators
The Chicago Lighthouse for People Who Are Blind or Visually Impaired
Ophthonix Inc
University of Illinois at Chicago
  More Information

Responsible Party: Janet Szlyk, PhD, The Chicago Lighthouse Identifier: NCT00894192     History of Changes
Other Study ID Numbers: OPH-2005-0516 
Study First Received: May 4, 2009
Last Updated: May 5, 2009

Keywords provided by The Chicago Lighthouse for People Who Are Blind or Visually Impaired:
This study tests functional ability of patients with refractive error or normal vision while using different types of eyeglasses. processed this record on February 20, 2017