RT info:eu-repo/semantics/article T1 OCT Variability Prevents Their Use as Robust Biomarkers in Multiple Sclerosis A1 Para Prieto, Marta A1 Martín Herranz, Raúl A1 Crespo, Sara A1 Mena García, Laura A1 Valisena Frías, Andrés Eduardo A1 Cordero, Lisandro A1 González Fernández, Sara A1 Arenillas Lara, Juan Francisco A1 Téllez Lara, María de las Nieves A1 Pastor Jimeno, José Carlos K1 Oftalmología K1 Optometría K1 foveal thickness K1 retinal nerve fiber layer K1 multiple sclerosis K1 3201.09 Oftalmología K1 2209.15 Optometría AB Objective: To evaluate the agreement between the peripapillary retinal nerve fiber layer (pRNFL) and foveal thickness (FT) measurements among three different spectral domain-optical coherence tomography (SD-OCT) instruments in a sample of multiple sclerosis (MS) patients and a healthy age-matched control group.Methods: An observational cross-sectional study with three groups: healthy subjects and MS patients w/w a previous clinical diagnosis of optic neuritis (ON) was conducted. The pRNFL and FT were measured using three different SD-OCT instruments (OCT PRIMUS 200 and OCT CIRRUS 500 SD-OCT [Carl Zeiss Meditec] and OCT 3D 2000 [Topcon]).Results: Twenty eyes from 10 healthy subjects matched in age with MS patients without a previous history of eye disease and 62 MS eyes from 31 MS patients (29 eyes without history of ON and 33 eyes with history of ON) were enrolled. Healthy subjects and MS patients without ON did not show differences between the pRNFL and FT thickness (P>0.99) with any of the instruments. However, MS eyes with a previous episode of ON showed thinner pRNFL and FT (P<0.01). PRIMUS and CIRRUS OCT showed better agreement of the pRNLF and FT in both healthy and MS eyes. However, 3D OCT showed less agreement in the pRNFL measurement with CIRRUS in both healthy and MS eyes.Interpretation: Although OCT is a valuable technology to improve MS patient assessment, differences between devices must be taken into account. It is necessary to create an international group that standardizes the measurement conditions and above all that provides reference bases for normal subjects. PB DOVE PRESS YR 2021 FD 2021 LK https://uvadoc.uva.es/handle/10324/81033 UL https://uvadoc.uva.es/handle/10324/81033 LA spa NO Clin Ophthalmol. 2021;15:2025-2036 DS UVaDOC RD 12-ene-2026