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(Investigative Ophthalmology and Visual Science. 1972;11:989-1003.)
© 1972 by The Association for Research in Vision and Ophthalmology, Inc.

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Morphology of the Primate Optic Nerve

II. Total Fiber Size Distribution and Fiber Density Distribution

ALBERT M. POTTS 1, DONALD HODGES 1, C. B. SHELMAN 1, KARL J. FRITZ 1, NORMAN S. LEVY 1, and YVONNE MANGNALL 1

1 Department of Ophthalmology, The Eye Research Laboratories, University of Chicago, 950 E. 59th St., Chicago, Ill. 60637

With the help of automation we have been able to determine cross-section area for each fiber in a thin section of primate optic nerve. Size histograms (for axis cylinder) show unimodal distribution for both human and rhesus monkey with the largest number of fibers between 1/4 and 1/2 µin diameter. By our technique we can make numerical maps of fiber concentration and per cent smallfibers in an optic nerve cross-section. Our maps show a high concentration of optic nerve fibers in the areas known to carry the macular fibers. In some cases this high concentration is reflected in a preponderance of small fibers. However, there is much individual variation in both measurements.

Key Words: optic nerve fibers • optic nerve fiber diameter • optic nerve fiber area • optic nerve fiber density • Rhesus • human




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