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  • Title: Correlation of echographic and photographic assessment of optic nerve head cupping in children.
    Author: Sayed MS, Dale EA, Osigian CJ, Cavuoto KM, Shi W, Chang TC.
    Journal: J AAPOS; 2017 Oct; 21(5):389-392. PubMed ID: 28919543.
    Abstract:
    PURPOSE: To determine the diagnostic value of B-scan echography in optic nerve head (ONH) cupping estimation in children. METHODS: The medical records of pediatric patients who had previously undergone examination under anesthesia and for whom both adequate B-scan echography images and optic nerve head (ONH) photographs and were available were reviewed retrospectively. The cup:disk ratio was estimated with a grading scale of 0-1.0 and rounded to the nearest tenth; degree of cupping was estimated from B-scan echography (small, medium, or large) by 5 masked graders (3 glaucoma specialists and 2 ophthalmic sonographers) on 2 separate occasions. Inter- and intraobserver agreement in echographic and photographic cupping assessment by the masked graders as well as correlation of echographic and photographic cup size estimation was evaluated. RESULTS: A total of 36 children were included. Glaucoma specialists reliably assessed cup:disk ratio with moderately good consistency across specialists (average intraclass correlation coefficient [ICC] for intraobserver agreement, 0.86; average ICC for interobserver agreement, 0.71). Sonographers were extremely reliable in assessment of cup size when examining echographic images (ICC for both inter- and intrarater variability, 1.0). Echographic estimate of cup size correlated poorly with cup:disk ratio (ICC, 0.34). CONCLUSIONS: B-scan echography is a reliable and consistent diagnostic tool in estimating the degree of ONH cupping in children and can be very useful in patients in whom direct visualization is not feasible. Failure to account for disk size may have contributed to the poor correlation between echographic cup size and photographic cup:disk ratio.
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