Quantitative perimetry in compressive optic neuropathy and optic neuritis
J. D. Trobe and J. S. Glaser
The Goldmann perimetric defects in 20 cases of compressive optic neuropathy
and 54 cases of optic neuritis were analyzed. While defects involving the
papillomacular bundle were the rule in both compressive and neuritis cases,
sparing of the fixational area occurred in 24% of neuritis eyes but in none
of the eyes with compressive neuropathy. The most reliable differential
perimetric sign was the presence of a hemianopic defect; at least one eye
of 15 (75%) cases of compression showed such a defect, which was not found
in any neuritis cases. The I2e was the largest kinetic isopter to
demonstrate the hemianopic defect in a substantial proportion of cases.
These defects were corroborated with sequential static presentation of the
I2e to I4e stimuli to either side of the vertical meridan, and with similar
techniques using 18/1,000 red test objects at the tangent screen.
