Corneal Astigmatism Measurement Study

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Alcon Research
ClinicalTrials.gov Identifier:
NCT00818532
First received: January 6, 2009
Last updated: April 6, 2012
Last verified: July 2009
  Purpose

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


Condition
Astigmatism

Study Type: Observational
Study Design: Time Perspective: Prospective

Further study details as provided by Alcon Research:

Primary Outcome Measures:
  • Measurement of corneal power [ Time Frame: Day 1 ] [ Designated as safety issue: No ]

Enrollment: 50
Study Start Date: December 2008
Study Completion Date: April 2009
Primary Completion Date: April 2009 (Final data collection date for primary outcome measure)
Groups/Cohorts
1
Measurement device

  Eligibility

Ages Eligible for Study:   50 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

community sample

Criteria

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
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00818532

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

No publications provided

Responsible Party: Alcon Research
ClinicalTrials.gov Identifier: NCT00818532     History of Changes
Other Study ID Numbers: P-08-04
Study First Received: January 6, 2009
Last Updated: April 6, 2012
Health Authority: United States: Institutional Review Board

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

Additional relevant MeSH terms:
Astigmatism
Refractive Errors
Eye Diseases

ClinicalTrials.gov processed this record on August 19, 2014