Comparison of Four Different Aberrometers for Evaluation of Higher Order Visual Aberrations
NCT ID: NCT01230164
Last Updated: 2011-12-21
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
21 participants
OBSERVATIONAL
2010-08-31
2011-07-31
Brief Summary
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The purpose of this study is to compare 4 different aberrometers -Wavescan (Visx Technology), Zywave (Bausch \& Lomb), Ladarwave aberrometer (Alcon Inc.) and Allegro Analyzer (Alcon Inc). In particular, the investigators propose to focus on the ability of these devices to display the higher order visual aberrations and to compare the quality of outputs from these 4 devices in normal healthy subjects.
Detailed Description
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Conditions
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Study Design
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PROSPECTIVE
Eligibility Criteria
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Inclusion Criteria
* no ocular abnormality other than refractive error
* patient in generally good \& stable overall health
* has not worn contact lenses (hard or gas permeable lenses for at least 3 weeks and soft lenses for at least 3 days) prior to the study exam
* corneal topography must be normal, as judged by the investigator
* topical anesthesia and mydriatics must be tolerated
* patient must be able to fixate steadily
* ability to understand and provide informed consent to participate in this study
Exclusion Criteria
* history of ocular trauma, infection, disease, or abnormality other than refractive error
* myopia or hyperopia \> 7.0 D, astigmatism \>3.0 D
* uncorrectable visual acuity below 20/20
* abnormal corneal topography pattern including, but not limited to keratoconus, forme fruste keratoconus, or corneal warpage
* pupil sizes below 6.0 mm under mydriasis
* iris problems including, but not limited to, coloboma and previous iris surgery
* ocular media problems, corneal, lens and/or vitreous opacities including, but not limited to cataract
* ocular movement abnormalities including, but not limited to, strabismus or nystagmus
* phenol red thread test (Zone Quick-Menicon Ltd) less than 9 mm/15 seconds
* pregnancy and lactation
18 Years
ALL
Yes
Sponsors
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Massachusetts Eye and Ear Infirmary
OTHER
Responsible Party
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Principal Investigators
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Roberto Pineda, MD
Role: PRINCIPAL_INVESTIGATOR
Massachusetts Eye and Ear Infirmary
Locations
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Massachusetts Eye and Ear Infirmary
Boston, Massachusetts, United States
Countries
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Other Identifiers
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09-03-016
Identifier Type: -
Identifier Source: org_study_id