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Corneal Astigmatism Measurement Study

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ClinicalTrials.gov Identifier: NCT00818532
Recruitment Status : Completed
First Posted : January 7, 2009
Last Update Posted : April 9, 2012
Information provided by (Responsible Party):
Alcon Research

Brief Summary:
To assess which commercially available measurement device is most accurate in measuring low (< 1.0 D) degrees of corneal astigmatism.

Condition or disease

Study Type : Observational
Actual Enrollment : 50 participants
Time Perspective: Prospective
Study Start Date : December 2008
Primary Completion Date : April 2009
Study Completion Date : April 2009

Measurement device

Primary Outcome Measures :
  1. Measurement of corneal power [ Time Frame: Day 1 ]

Information from the National Library of Medicine

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Ages Eligible for Study:   50 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
community sample

Inclusion Criteria:

  • 50 years of age and older
  • Proof of eye exam within the last 3 months
  • Corneal astigmatism of <1.0 diopter

Exclusion Criteria:

  • Prior history of refractive or corneal surgery
  • Corneal trauma/disease
  • Intraocular surgery

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): NCT00818532

United States, Texas
Alcon Call Center for Trial Locations
Fort Worth, Texas, United States, 76134
Sponsors and Collaborators
Alcon Research

Responsible Party: Alcon Research
ClinicalTrials.gov Identifier: NCT00818532     History of Changes
Other Study ID Numbers: P-08-04
First Posted: January 7, 2009    Key Record Dates
Last Update Posted: April 9, 2012
Last Verified: July 2009

Keywords provided by Alcon Research:
Corneal astigmatism
Low diopter
Corneal measurement
Corneal astigmatism < 1 Diopter

Additional relevant MeSH terms:
Refractive Errors
Eye Diseases