Preliminary results of a prospective study of inter- and intra-user variability of the Royal Veterinary College corneal clarity score (RVC-CCS) for use in veterinary practice

Veterinary Ophthalmology
Rick F SanchezNatàlia Escanilla

Abstract

To introduce a new corneal clarity score for use in small animals and describe its inter- and intra-user variability. Twelve dogs and two cats with corneal abnormalities and five dogs with healthy corneas. Four examiners scored every patient twice and never consecutively, focusing on the central cornea. The peripheral cornea was scored separately. The following scoring system was used to describe corneal clarity: G0: no fundus reflection is visible on retroillumination (RI) using a head-mounted indirect ophthalmoscope. G1: a fundus reflection is visible with RI. G2: a 0.1-mm diameter light beam is visible on the anterior surface of the iris and/or lens. G3: gross fundic features are visible when viewed with indirect ophthalmoscopy (IO) using a head-mounted indirect ophthalmoscope and a hand-held 30D lens, although fine details are not clear. G4: fine details of the fundic features are clearly visible with IO. The minimum grades given were analyzed for inter- and intra-user variability with kappa analysis. Intra- and interuser variability of the central corneal clarity ranged from 0.78 to 0.96, showing substantial to almost perfect reproducibility, and from 0.66 to 0.91, showing substantial to almost perfect reliability, respect...Continue Reading

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Citations

Oct 5, 2018·Journal of Veterinary Medical Education·Alyssa Show, Ryane E Englar
Apr 12, 2019·Veterinary Ophthalmology·Micki D ArmourAllen O Eghrari
Jan 19, 2019·Investigative Ophthalmology & Visual Science·William M BerkowskiCaryn E Plummer
Nov 5, 2020·Veterinary Ophthalmology·Rick F SanchezChristiane Göerig
Dec 7, 2021·Veterinary Ophthalmology·Amy P GalleyRoser Tetas Pont

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