CHOICE OF SUBJECTIVE OCULAR REFRACTION TECHNIQUE AND CORNEAL TOPOGRAPHY OF KERATOCONUS
Launched by UNIVERSITY HOSPITAL, CLERMONT-FERRAND · Nov 21, 2019
Trial Information
Current as of July 04, 2025
Completed
Keywords
ClinConnect Summary
Keratoconus is a rare evolving corneal ectasia that alters visual acuity. To improve spectacle-corrected visual acuity, various subjective refraction techniques can be used. The Jackson Cylinder Cross Method, the Astigmatic Dial Technique and the Stenopeic Slit are three validated subjective refraction techniques for measuring astigmatism. The subjective refraction techniques of keratoconus-carrying patients have never been studied.
The main hypothesis is that the most suitable subjective ocular refraction method varies with the corneal topography of the keratoconus.
The investigators col...
Gender
ALL
Eligibility criteria
- Inclusion Criteria:
- • adult persons
- • patients with keratoconus
- • patients with alteration of visual acuity
- • ability to give informed consent to participate in the study
- • affiliation to a social security scheme
- Exclusion Criteria:
- • Keratoconus grafted with cornea or with intracorneal rings.
- • Central corneal opacities.
- • Presence of other eye diseases affecting visual acuity.
- • Patients under guardianship, curatorship or justice protection.
- • Pregnant or breastfeeding women.
- • Refusal to participate in the study.
About University Hospital, Clermont Ferrand
The University Hospital of Clermont-Ferrand is a leading academic medical institution dedicated to advancing healthcare through innovative research and clinical trials. Renowned for its multidisciplinary approach, the hospital integrates cutting-edge scientific inquiry with patient care, fostering an environment that promotes collaboration among healthcare professionals, researchers, and academic partners. With a strong commitment to improving patient outcomes, the institution actively engages in a wide array of clinical studies, ranging from early-phase trials to large-scale interventions, aimed at addressing critical health challenges and enhancing treatment modalities. Its state-of-the-art facilities and expertise make it a pivotal contributor to clinical research in the region and beyond.
Contacts
Jennifer Cobb
Immunology at National Institute of Allergy and Infectious Diseases (NIAID)
Locations
Clermont Ferrand, , France
Patients applied
Trial Officials
Frédéric Chiambaretta
Principal Investigator
University Hospital, Clermont-Ferrand
Timeline
First submit
Trial launched
Trial updated
Estimated completion
Not reported
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