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Abstract #60679 Published in IGR 16-4
Do pattern deviation values accurately estimate glaucomatous visual field damage in eyes with glaucoma and cataract?
Matsuda A; Hara T; Miyata K; Matsuo H; Murata H; Mayama C; Asaoka RBritish Journal of Ophthalmology 2015; 99: 1240-1244
BACKGROUND/AIMS: To study the efficacy of pattern deviation (PD) values in the estimation of visual field compensating the influence of cataract in eyes with glaucoma. METHODS: The study subjects comprised of 48 eyes of 37 glaucoma patients. Mean total deviation value (mTDs) on Humphrey Field Analyzer after cataract surgery was compared with mean PD (mPD) before the surgery. Visual field measurements were carried out ≤6 months before (VFpre) and following (VFpost) successful cataract surgery. The difference between the mPD or mTD values in the VFpre and mTD values in the VFpost (denoted as εmPD/ΔmTD) was calculated, and the influence of the extent of 'true' glaucomatous visual field damage or cataract (as represented by εmPD and ΔmTD, respectively) on this difference was also investigated. RESULTS: There was a significant difference between mTD in the VFpre and mTD in the VFpost (p<0.001, repeated measures analysis of variance). There was not a significant difference between mPD in the VFpre and mTD in the VFpost (p=0.06); however, εmPD was significantly correlated with the mTD in VFpost and also ΔmTD (R(2)=0.56 and 0.27, p<0.001, Pearson's correlation). The accurate prediction of the mTD in the VFpost can be achieved using the pattern standard deviation (PSD), mTD and also visual acuity before surgery. CONCLUSIONS: Clinicians should be very careful when reviewing the VF of a patient with glaucoma and cataract since PD values may underestimate glaucomatous VF damage in patients with advanced disease and also overestimate glaucomatous VF damage in patients with early to moderate cataract.
Department of Ophthalmology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan.
Full articleClassification:
6.6.2 Automated (Part of: 6 Clinical examination methods > 6.6 Visual field examination and other visual function tests)
9.4.4.2 Glaucomas associated with cataracts (Part of: 9 Clinical forms of glaucomas > 9.4 Glaucomas associated with other ocular and systemic disorders > 9.4.4 Glaucomas associated with disorders of the lens)