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  • Title: Influence of education and diagnostic modes on glaucoma assessment by optometrists.
    Author: Yoshioka N, Wong E, Kalloniatis M, Yapp M, Hennessy MP, Agar A, Healey PR, Hayen A, Zangerl B.
    Journal: Ophthalmic Physiol Opt; 2015 Nov; 35(6):682-98. PubMed ID: 26432198.
    Abstract:
    PURPOSE: To evaluate the influence of different clinical examination techniques, including optic nerve head (ONH) photography, visual field tests, and adjunct imaging on the diagnosis of glaucoma by Australian and New Zealand optometrists. The effect of a short-term, didactic teaching module on these is also explored. METHODS: Clinical data of 30 patients previously seen at the Centre for Eye Health was collected and compiled into glaucoma diagnostic assessment modules. Each of six modules contained different combinations of clinical examination results and required a classification of the cases as normal, suspicious or glaucoma. A cohort of 54 Australian and New Zealand optometrists were recruited for the study and allocated into two cohorts. The intervention group completed a glaucoma training course prior to the assessment while the control group completed the assessment without additional training. Diagnostic accuracy was compared between modules and optometrist groups. RESULTS: High false negative rates were observed with ONH photography, which were drastically reduced with the addition of visual field, albeit at the cost of increased false positive rates. Addition of adjunct imaging techniques partially compensated for the increase in the false positive rate from the visual field, but had limited effect on false negative rate. Educational intervention resulted in larger improvement in the diagnostic ability when multiple imaging modalities were provided. CONCLUSION: The study highlighted the importance of combining both structural and functional assessments in glaucoma. Current imaging technology demonstrated limited usefulness for event diagnosis due to the persistent difficulties of defining structural and functional loss in glaucoma, thus highlighting the need for new glaucoma assessment techniques. Short-term didactic teaching programs may only result in limited improvement of glaucoma diagnostic ability in optometrists, and hence, it may need to be combined with long-term and/or non-didactic training components to obtain a greater effect.
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