Biomedical subjects
Publications and source records attributed to M Fairclough.
We developed a visual field simulator for teaching perimetry on a Goldmann-type perimeter. It can present reproducible normal and defective visual fields, is portable and can be used without being attached to the perimeter, and will provide an easier way to train individuals in the correct techniques of perimetry.
This study shows that the field defects in simple glaucoma can occur as paracentral scotoma (77%) as well as nasal skip defects (20%) in the central or peripheral field. Also a combination (54%) of both defects is already possible at the start. This points out that more than one nerve bundle can be affected either simultaneously or one shortly after the other. It was also remarkable that by Drance's modification of Armaly's method for two eyes a typical nasal skip and/or a paracentral scotoma with temporal visual field defect occurred as the first sign.
The progression of field damage of 48 eyes with chronic simple glaucoma and a splinter hemorrhage on the disc was compared with that of 48 chronic simple glaucoma eyes without hemorrhage. The incidence of visual field progression was substantially higher among those with a hemorrhage. Similar visual field progression was substantially higher in 29 eyes with elevated introcular pressure and a disc hemorrhage when compared with 29 ocular hypertensive patients with no hemorrhage. The prognostic importance of a disc hemorrhage is discussed.
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