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The K-Map Study, Global Prevalence of KC

University Hospital, Geneva · with ELZA Institute · NCT03115710

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Opens the official ClinicalTrials.gov record, with the study team’s contacts. Bored Studies doesn’t enroll anyone.

Key facts

Compensation
Not posted. Ask the study team before screening.
Who can join
Ages 6–23 · All sexes
Healthy volunteers
Accepted
Study type
Observational
Target enrollment
20000
US sites recruiting
1
Study start
December 28, 2015
Record last updated
August 11, 2025

Status re-checked against ClinicalTrials.gov within the last 12 hours.

What the study is about

Keratoconus is a ocular disease classified under ectatic diseases which often results in bilateral and asymmetrical corneal distortion. It usually affects patients at young age and can cause severe visual loss.

The overall goal of this study is to assess the prevalence of keratoconus (KC) in children and adolescents in various regions of the world based on modern tomographic imaging methods, and to verify whether the occurrence rates reported from literature should be corrected. Our hypothesis is that the prevalence of the disease is much higher than that traditionally reported.

At each site, corneal tomography examinations (Pentacam) will be performed bilaterally in children and adolescents, who are not ill or with any ophthalmological symptom. The population to be studied will be composed of children and adolescents on medical visits for non-ophthalmologic reasons, aged between 6 and 20 years. Multiple cities, from different continents (North America, South America, Asia and Europe) will participate.

Being studied: Rotating Scheimpflug camera (Pentacam HR)

Conditions: Keratoconus

Eligibility criteria

Copied from the official record. The study team makes the final decision at screening.

Show full criteria

Inclusion Criteria

  • Male or female, 6-23 years of age.
  • Subjects seen for a non-ophthalmic appointment
  • Provide signed and dated patient consent form (signed by parents / legal guardians).
  • Willing to comply with all study procedures and be available for the duration of the study

Exclusion Criteria

  • Patients with a preexisting ocular disease / condition
  • Pregnancy or breastfeeding

Recruiting US locations

  • USC Roski Eye Institute

    Los Angeles, CA 90033

    Site contact: J. Bradley Randleman, MD

Study contacts (from the official record)

  • Farhad Hafezi, MDPhD · +41 44 741 81 81 · fhafezi@elza-institute.com
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The K-Map Study, Global Prevalence of KC (NCT03115710) | Bored Studies