Canthaxanthin Retinopathy: A Long-term Observation

May 20, 2010 updated by: University of Cologne
Canthaxanthine is a naturally occurring carotenoid that has been a popular over-the-counter oral artificial tanning agent in Europe, Canada, and Australia since 1979. It is also used at low dosage as a food-colouring agent and as a therapeutic agent for photosensitivity disorders such as erythropoietic protoporphyria. Canthaxanthin retinopathy was first described in 1982 by Cortin et al. In Germany the office of the federal board of health refused the permit for oral tanning agents containing canthaxanthine in 1985. At that time the long-term course of the disease was not known. 25 years later the investigators did these long-term follow-up examinations.

Study Overview

Status

Completed

Conditions

Study Type

Observational

Enrollment (Actual)

35

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Germany
    • NRW
      • Cologne, NRW, Germany, 50937
        • University Eye Hospital, University of Cologne

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients with a history of oral tanning agents should report at the University Eye hospital for examination.

Description

Inclusion Criteria:

  • patients using oral tanning agents for at least 2 months.
  • patients of 18 years or older

Exclusion Criteria:

  • none.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Case-Only
  • Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
all eye diseases
Time Frame: 2008 and 2009
All patients will have the follow-up examination 2008 or 2009. The examination included at most visual acuity (distant and near vision), Amsler test, examination of anterior segment, posterior segment, 10-2 and 30-2 visual field, electrooculography, electroretinography, multifocal electroretinography, fundus photography, fluorescein angiography, and an examination for autofluorescence.
2008 and 2009

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Cologne

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

December 1, 1983

Primary Completion (Actual)

December 1, 2009

Study Completion (Actual)

May 1, 2010

Study Registration Dates

First Submitted

May 20, 2010

First Submitted That Met QC Criteria

May 20, 2010

First Posted (Estimate)

May 21, 2010

Study Record Updates

Last Update Posted (Estimate)

May 21, 2010

Last Update Submitted That Met QC Criteria

May 20, 2010

Last Verified

May 1, 2010

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • AHARMS-8310

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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