Abstract
The nasal visual field was examined both with kinetic and static perimetry. The nasal step can be a physiological sign of the anatomic and functional asymmetry of the retina. In this case it is of a small degree and changeable. Sometimes it is an artifact. The nasal step can also be a glaucomatous defect. It is sometimes late as a sign of the distal edge of the arcuate scotoma, but often is an early sign, because it is the result of the different susceptibility between opposite hemifields. It is easy to discover by kinetic perimetry because of its typical shape and invariable location and easy to check by static perimetry. If it is an early sign, it is possible to reverse. In pratical terms, the nasal step is an early characteristic glaucomatous field loss like the isolated scotomas of the Bjerrum area. Unfortunately it can be observed also in normal visual fields and in other pathological conditions. Besides it may be easily detected, well analyzed in the assessment phase of perimetry and used as a sensitive marker in the follow up of glaucomatous damage.
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© 1979 Dr W. Junk bv Publishers
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Zingirian, M., Calabria, G., Gandolfo, E. (1979). The Nasal Step: An Early Glaucomatous Defect?. In: Greve, E.L. (eds) Third International Visual Field Symposium Tokyo, May 3–6, 1978. Documenta Ophthalmologica Proceedings Series, vol 19. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-9611-3_32
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DOI: https://doi.org/10.1007/978-94-009-9611-3_32
Publisher Name: Springer, Dordrecht
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