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

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT01230164
First Posted: October 28, 2010
Last Update Posted: December 21, 2011
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Massachusetts Eye and Ear Infirmary
  Purpose

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
Normal Individuals With Visual Aberrations

Study Type: Observational
Study Design: Time Perspective: Prospective
Official Title: Comparison of Four Different Aberrometers for Evaluation of Higher Order Visual Aberrations

Further study details as provided by Massachusetts Eye and Ear Infirmary:

Enrollment: 21
Study Start Date: August 2010
Study Completion Date: July 2011
Primary Completion Date: July 2011 (Final data collection date for primary outcome measure)
  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Normal subjects over the age of 18 with visual abberations.
Criteria

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
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01230164


Locations
United States, Massachusetts
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
  More Information

Responsible Party: Massachusetts Eye and Ear Infirmary
ClinicalTrials.gov Identifier: NCT01230164     History of Changes
Other Study ID Numbers: 09-03-016
First Submitted: October 27, 2010
First Posted: October 28, 2010
Last Update Posted: December 21, 2011
Last Verified: December 2011