Canthaxanthin Retinopathy: A Long-term Observation
- Conditions
- Canthaxanthin Retinopathy
- Registration Number
- NCT01128062
- Lead Sponsor
- University of Cologne
- Brief Summary
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.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 35
- patients using oral tanning agents for at least 2 months.
- patients of 18 years or older
- none.
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method all eye diseases 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.
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
University Eye Hospital, University of Cologne
🇩🇪Cologne, NRW, Germany