Abstract
To the Editor. —In studying the article by Trobe and Glaser (Archives96:1210-1216, 1978), I was struck by two facets that deserve mention. First, the authors refer to a color saturation difference at the vertical meridian as a hemiachromatopsia. Theoretically, the authors are actually defining a hemidyschromatopsia since there is a dysfunction of color appreciation and not a total loss of color vision in one hemifield. Secondly, the authors seem to me to have overemphasized the importance of normal central acuity, which militates against the possibility of a compressive optic neuropathy. It has been shown in the monkey that the arcuate nerve fiber bundles continue segregated even into the optic chiasm. 1 Kearns and Rucker in 1958 reported four cases of arcuate defects in patients with chromophobe adenomas. 2 Harrington has recorded nine case reports of middle cranial fossa lesions that resulted in arcuate scotomas. 3 It must be remembered
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