@misc{indiciaeeba780aab0d7, title = {How often do patients need visual field tests?}, author = {A C Viswanathan and R A Hitchings and F W Fitzke}, year = {1997}, doi = {10.1007/bf00947085}, url = {https://pubmed.ncbi.nlm.nih.gov/9342606/}, note = {Source identifier: 9342606} }