DEVELOPMENT AND VALIDATION OF THE “KERATOCONUS END-POINTS ASSESSMENT QUESTIONNAIRE” (KEPAQ), A DISEASE-SPECIFIC INSTRUMENT FOR EVALUATING SUBJECTIVE EMOTIONAL DISTRESS AND VISUAL FUNCTION THROUGH RASCH ANALYSIS

Development and Validation of the “Keratoconus End-Points Assessment Questionnaire” (KEPAQ), a Disease-Specific Instrument for Evaluating Subjective Emotional Distress and Visual Function Through Rasch Analysis

Kepa Balparda,1,2 Tatiana Herrera-Chalarca,3 Laura Andrea Silva-Quintero,4 Sneider Alexander Torres-Soto,4 Claudia Marcela Vanegas-Ramírez5 1Department of Cornea and Refractive Surgery, Black Mammoth Surgical, Medellín, Colombia; 2Universidad de Valladolid, Valladolid, Spain; 3Department of Clinical Research, Black Mammoth Surgical, M

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