Status:
COMPLETED
Comparison of Four Different Aberrometers for Evaluation of Higher Order Visual Aberrations
Lead Sponsor:
Massachusetts Eye and Ear Infirmary
Conditions:
Normal Individuals With Visual Aberrations
Eligibility:
All Genders
18+ years
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. T...
Eligibility Criteria
Inclusion
- 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
- 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
Key Trial Info
Start Date :
August 1 2010
Trial Type :
OBSERVATIONAL
Allocation :
ACTUAL
End Date :
July 1 2011
Estimated Enrollment :
21 Patients enrolled
Trial Details
Trial ID
NCT01230164
Start Date
August 1 2010
End Date
July 1 2011
Last Update
December 21 2011
Active Locations (1)
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1
Massachusetts Eye and Ear Infirmary
Boston, Massachusetts, United States, 02114