Keratoconus
Conditions
Keywords
Keratoconus, Eye rubbing
Brief summary
KC is a degenerative disorder of the cornea. Keratoconus etiopathogenesis remains unclear and may rely on environmental and genetic factors. Usually considered as a rare disease (\<1/2000), but the prevalence is nowadays growing worldwide up to 1/500. In that pathology, cornea progressively gets thinner, and there is a deformation of the corneal surface which can induce high order optical aberrations and visual impairment. Eye rubbing is certainly the main factor in the progression or development of keratoconus (KC), yet it is only very partially evaluated and quantified in current management. Environmental and clinical factors will be collected and associated with a eye rubbing Questionnaire, specifically pointing out eye rubbing.
Detailed description
CNRK center is working on an eye rubbing questionnaire since 2017 in order to quantify that pejorative factor. Patient education can limit in a certain amount the Keratoconus progression. Thus, our objective will be to evaluate the therapeutic impact on Keratoconus progression of patient's education against eye rubbing according to an eye rubbing Questionnaire. The validation of a dedicated questionnaire is an important act that will allow the scientific evaluation of this factor with both environmental and behavioral traits. It can thus be integrated into our care activity for its intrinsic educational and therapeutic virtues and for its decision-making aid for certain treatments. It will be useful first of all for the refinement of the correct prescription of corneal collagen crosslinking for evolving KC or KC with a high risk of progression.
Interventions
OTHEReye rubbing questionnaire
eye rubbing questionnaire at baseline and 15 days later for exploratory phase; at baseline and then validation by a Group Nominal
Sponsors
University Hospital, Bordeaux
Study design
Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
PREVENTION
Masking
NONE
Intervention model description
eye rubbing questionnaire at baseline and 15 days later
Eligibility
Sex/Gender
ALL
Age
13 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Coming for the first time for expert advice on KC * Having a suspected or known KC * Being over 13 years old (or from 13 years old) * Possess computer connection equipment (computer, tablet or smartphone) and access to the network, for the completion of the questionnaire at home. * Being affiliated to or beneficiary of health insurance * Have signed the informed consent form from the patient and from legal representatives for minor patient
Exclusion criteria
* Being incapacitated or unable to follow study procedures * Patient under legal protection * Previous ocular surgery
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| validation of our eye rubbing questionnaire | Baseline and 15 days after (Day 15) | validation of our eye rubbing questionnaire will be made through the evaluation of its Suitability (Appearance validity, Content validity), Reliability (Consistency and homogeneity, Reproducibility), Applicability (Feasibility and acceptability), Validity (Construct validity), Sensitivity (Sensitivity to change, Discriminative validity) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| questionnaire simplification | Month 6 | Statistical criteria for questionnaire simplification: ceiling and floor effects, response rates, correlations, reproducibility, measurement error and internal consistency. These elements are part of the content validity and reliability stages of the COSMIN recommendations |
| Expert consensus by nominal group | Month 6 | Expert consensus by nominal group. This is the only method suitable for validating a clinical questionnaire |
Countries
France
Outcome results
None listed