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To evaluate self-reported visual function and the psychosocial impact of visual loss EYS-associated retinal degeneration (EYS-RD) using two patient-reported outcome (PRO) measures: Michigan Retinal Degeneration Questionnaire (MRDQ) and Michigan Vision-related Anxiety Questionnaire (MVAQ). Cross-sectional, single-center study conducted at a tertiary care hospital in Portugal. Patients with biallelic EYS variants were invited to participate. Clinical data including demographics, ETDRS best-corrected visual acuity (BCVA) in the better-seeing eye and genetic testing results were collected. Interviews were carried out during clinic visits or by phone between November 2021 and February 2022. A blind grader used horizontal and vertical spectral domain optical coherence tomography (SD-OCT) scans to manually measure ellipsoid zone (EZ) width in the nasal, temporal, superior and inferior macular quadrants to calculate the EZ area. Forty-nine patients (53.1% males; mean age 53 ± 14 years) were included. A positive correlation ( p  &lt; .05) was found between age and most MRDQ domain scores (central vision, color vision, contrast sensitivity, scotopic function, photopic peripheral vision and mesopic peripheral vision). A negative correlation was found between both BCVA and EZ area across all MRDQ domains. In MVAQ, SD-OCT EZ area negatively correlated with both rod function and cone function-related anxiety. Neither age, BCVA or gender correlated with MVAQ domains. This study provides strong evidence supporting a correlation between PRO measures and both functional and structural clinician-reported outcomes. The use of MRDQ and MVAQ adds a new dimension to our understanding of EYS-RD and establishes both PRO measures as important disease outcome measures.

Self-reported visual function and psychosocial impact of visual loss in EYS -associated retinal degeneration in a Portuguese population