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Comparison of Four Different Aberrometers for Evaluation of Higher Order Visual Aberrations

Sponsor
Massachusetts Eye and Ear Infirmary (Other)
Overall Status
Completed
CT.gov ID
NCT01230164
Collaborator
(none)
21
Enrollment
1
Location
11
Duration (Months)
1.9
Patients Per Site Per Month

Study Details

Study Description

Brief Summary

An aberrometer measures visual aberrations by mapping how light rays travel through the eye and by providing maps using colored gradients to represent the magnitude of refractive errors of the eye.

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.

Condition or Disease Intervention/Treatment Phase

    Study Design

    Study Type:
    Observational
    Actual Enrollment :
    21 participants
    Time Perspective:
    Prospective
    Official Title:
    Comparison of Four Different Aberrometers for Evaluation of Higher Order Visual Aberrations
    Study Start Date :
    Aug 1, 2010
    Actual Primary Completion Date :
    Jul 1, 2011
    Actual Study Completion Date :
    Jul 1, 2011

    Outcome Measures

    Primary Outcome Measures

      Eligibility Criteria

      Criteria

      Ages Eligible for Study:
      18 Years and Older
      Sexes Eligible for Study:
      All
      Accepts Healthy Volunteers:
      Yes
      Inclusion Criteria:

      • male or female, at least 18 years of age

      • 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 surgery

      • 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

      Contacts and Locations

      Locations

      Site City State Country Postal Code
      1 Massachusetts Eye and Ear Infirmary Boston Massachusetts United States 02114

      Sponsors and Collaborators

      • Massachusetts Eye and Ear Infirmary

      Investigators

      • Principal Investigator: Roberto Pineda, MD, Massachusetts Eye and Ear Infirmary

      Study Documents (Full-Text)

      None provided.

      More Information

      Publications

      None provided.
      Responsible Party:
      Massachusetts Eye and Ear Infirmary
      ClinicalTrials.gov Identifier:
      NCT01230164
      Other Study ID Numbers:
      • 09-03-016
      First Posted:
      Oct 28, 2010
      Last Update Posted:
      Dec 21, 2011
      Last Verified:
      Dec 1, 2011

      Study Results

      No Results Posted as of Dec 21, 2011