December 1967
Volume 6, Issue 6
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Articles  |   December 1967
The relative importance of the parasympathetic and sympathetic nervous systems for accommodation in monkeys
Author Affiliations
  • GöRAN YöRNQVIST
    Department of Pharmacology, University of Uppsala Uppsala, Sweden
Investigative Ophthalmology & Visual Science December 1967, Vol.6, 612-617. doi:
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      GöRAN YöRNQVIST; The relative importance of the parasympathetic and sympathetic nervous systems for accommodation in monkeys. Invest. Ophthalmol. Vis. Sci. 1967;6(6):612-617.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

The refractive state of monkeys was followed during preganglionic oculomotor nerve stimulation and during preganglionic sympathetic nerve stimulation performed against a background of oculomotor stimulation. It was found that oculomotor stimulation rates of 2 to 5 per second gave accommodative responses of about 1 to 3 D, and 20 to 50 stimuli per second gave about 6 to 11 D of accommodation. Accommodation followed changes in oculomotor stimulation within 1 to 2 seconds. The effect of sympathetic stimulation performed against a parasympathetic background was small and developed and vanished much more slowly. If it is permissible to draw conclusions from nerve stimulation experiments, it seems that sympathetic nerve activity is of very small importance for desaccommodation. There is a proportion of individuals who would gain from a sympathetic distance accommodation, hut because of the slowness of the effect its importance remains questionable

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