- Conditions
- Refractive Error, Presbyopia, Asthenopia, Eyeglasses
- Interventions
- D-28 bifocal lenses and frame, Progressive addition computer lenses and frame
- Device
- Lead sponsor
- University of Alabama at Birmingham
- Other
- Eligibility
- 40 Years and older
- Enrollment
- 40 participants
- Healthy volunteers
- Accepts healthy volunteers
- Timeline
- 2006 – 2007
- U.S. locations
- 1
- States / cities
- Birmingham, Alabama
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