Abstract There has been a very great deal written, dating from the time of Dobrowolsky (1885), but more especially within recent years, about the so-called dynamic lenticular astigmatism or astigmatic accommodation. There is, however, no scientific foundation for the claim that the accommodative effort of the ciliary muscle deforms the lens unequally on different meridians . . . all the evidence goes to show that if any part of the ciliary muscle contracts in life, it contracts equally all round.1 Contrary to this statement of Duke-Elder, there is at least one report in the literature showing that astigmatic accommodation is a possibility. Grossman2 found that in the cat physostigmine caused more active positive accommodation in the vertical meridian, by 5.00 D., than in the horizontal meridian. Since 1939 we have been investigating the nervous control of accommodation.3 During this time we have refracted the eyes of several hundred animals under different References 1. Duke-Elder, W. S.: Text-Book of Ophthalmology , St. Louis, C. V. Mosby Company, 1938, vol. 3, p. 759. 2. Grossman, K.: Further Investigations on Accommodation , Ophth. Rev. 23:1, 347, 1904. 3. (a) Olmsted, J. M. D., and Morgan, M. W., Jr.: Refraction of the Rabbit's Eye in the Unexcited and Excited State , Am. J. Physiol. 127:602, 1939. 4. (b) Morgan, M. W., Jr., and Olmsted, J. M. D.: Response of the Human Lens to a Sudden, Startling Stimulus , Proc. Soc. Exper. Biol. & Med. 42:612, 1939. 5. (c) Morgan, M. W., Jr.; Olmsted, J. M. D., and Watrous, W. G.: Sympathetic Action in Accommodation for Far Vision , Am. J. Physiol. 128:588, 1940. 6. (d) Olmsted, J. M. D., and Morgan, M. W., Jr.: The Influence of the Cervical Sympathetic Nerve on the Lens of the Eye , Am. J. Physiol. 133:720, 1941. 7. (e) Mohney, J. B.; Morgan, M. W., Jr.; Olmsted, J. M. D., and Wagman, I. H.: The Pathway of Sympathetic Nerves to the Ciliary Muscles in the Eye , Am. J. Physiol. 135:759, 1942. 8. Fincham, E. F.: A Study of Accommodation by Photography of the Living Lens and Ciliary Body in a Case of Aniridia , Tr. Ophth. Soc. U. Kingdom 40:145, 1935. 9. Hudelo, A.; Mécanisme de l'accommodation et myopie diabétique , Arch. d'opht. 47: 70, 1930. 10. Henderson, T.: The Anatomy and Physiology of Accommodation in Mammalia , Tr. Ophth. Soc. U. Kingdom 46:280, 1926. 11. Hughes, W. L. : Change of Axis of Astigmatism on Accommodation , Arch. Ophth. 26:742 ( (Nov.) ) 1941. 12. McDowell, G. : Why Does the Axis of the Astigmia Change ? Optic. Developments , (October) 1932.
Archives of Ophthalmology – American Medical Association
Published: Aug 1, 1943