An observational study in Keratoconus, sponsored by Democritus University of Thrace. Completed at 1 site in Greece. Open to participants aged 8 Years and older. Per ClinicalTrials.gov, last updated 2015-12-01.
Sponsored by Democritus University of Thrace · Observational
Primary objective of this study was evaluate the diagnostic capacity of fourier analysis of keratometric data in differentiating moderate KC and FFK from healthy corneas.
Study participants were recruited from the Cornea Outpatient service in a consecutive if eligible basis. Two study groups were formed: a)KC group included patients those were diagnosed and classified for moderate keratoconus according to the Amsler-Krumeich classification system, b) FFK group (FFKG) that included patients diagnosed with FFK, and c) Control group (CG) was formed by refractive surgery candidates. Pentacam (Pentacam HR, Oculus Optikgerate GmbH, Heidelberg, Germany)measurements were performed by the same experienced operator in a consistent way.
307 studies on the registry are indexed under Keratoconus; 56 are open to participants now.
This study's enrollment of 185 is above the median of 130 across 94 observational studies indexed under Keratoconus.
Browse Keratoconus studies →Democritus University of Thrace is the lead sponsor of 70 studies on the registry; 8 are open to participants now.
Counted across the registry records on this site, refreshed daily.
All participants were recruited from the Outpatients Cornea service, in a consecutive if eligible basis
Exclusion Criteria:
for all study groups:
KC group included patients those were diagnosed and classified for moderate keratoconus according to the Amsler-Krumeich classification system
Forme Fruste Keratoconus Group (FFKG) included patients diagnosed with FFK.
Control group(CG) was formed by refractive surgery candidates.
Spherical Component (SphRmin)
Spherical Component (SphRmin) displays the arithmetic mean of all radii of curvature for each ring
Time frame: One Day
Spherical Eccentricity (SphEcc)
Spherical Eccentricity is the asphericity that is calculated
Time frame: One Day
Maximum Decentration (MaxDec)
decentration or asymmetry of the astigmatic component which is derived from first order component of fourier analysis
Time frame: One Day
Regular Astigmatism at the Center(AstC)
the regular astigmatic component is calculated in the center and it is derived from the second order component of Fourier Analysis
Time frame: One Day
Regular Astigmatism at the Periphery (AstP)
the regular astigmatic component is calculated in the periphery and it is derived from the second order component of Fourier Analysis
Time frame: One day
Mean Astigmatism (MAst)
Mean Astigmatism is the average of astigmatism at the center and the periphery (MAst)
Time frame: One Day
Irregularitiy (Irr)
Time frame: one Day
Astigmatism at the Center plus the Irregularities (AstCir)
the irregularities of the cornea which can not be corrected by sphere, cylinder or prism and it is derived from higher order components of Fourier Analysis of Keratometric Data
Time frame: One day
Total Astigmatism (Tast) which is the sum of Mean Astigmatism and Irregularities.
Total Astigmatism (Tast) is the sum of Mean Astigmatism and Irregularities.
Time frame: One Day
This study is completed, as verified in Nov 2015. You cannot join it, but the record below documents what was studied.
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Democritus University of Thrace