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Intra‐ and interobserver reliability of lens equatorial length measurement using 35‐ MH z ultrasound biomicroscopy in dogs with cataract
Author(s) -
Barbé Charlotte,
Harran Nathaniel,
Goulle Frédéric
Publication year - 2017
Publication title -
veterinary ophthalmology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.594
H-Index - 50
eISSN - 1463-5224
pISSN - 1463-5216
DOI - 10.1111/vop.12423
Subject(s) - repeatability , reproducibility , ultrasound biomicroscopy , medicine , ultrasound , phacoemulsification , ophthalmology , nuclear medicine , lens (geology) , coefficient of variation , intraocular lens , visual acuity , mathematics , radiology , optics , statistics , physics
Purpose To determine intra‐ and interobserver reliability of lens equatorial length measurement using 35‐MHz ultrasound biomicroscopy in dogs with cataract. Methods Ocular ultrasonography was performed on 28 dogs (50 eyes) before phacoemulsification. Lens equatorial length was measured on still images obtained at 35 MHz in all dogs. Each observer (A and B) obtained the measurements independently. Coefficients of variation ( CV s) were used to assess intraobserver repeatability and interobserver reproducibility. Intraobserver repeatability was assessed by comparing measurements obtained on the same image on four different occasions by observer A. Interobserver reproducibility was assessed by comparing measurements obtained independently by both observers on the same image. Results CV used to assess intraobserver repeatability was 2.4% with good agreement and no significant difference between repetitions ( P > 0.05). CV used to assess interobserver reproducibility was 5.8% without significant difference between measurements obtained by the two observers ( P > 0.05). Conclusions Intraobserver repeatability and interobserver reproducibility were considered good for lens equatorial length measurement at 35 MHz in dogs with cataract. Ultrasound biomicroscopy could be an acceptable method to assess lens equatorial dimension before phacoemulsification and intraocular lens implantation in dogs with cataract.