Letter | Published:

Vision of Bermuda Reef Fishes

Naturevolume 214pages306307 (1967) | Download Citation



RELYING heavily on the conclusions of Beer1, Walls2 and Brett3 assert that fishes are generally near-sighted. Although Beer found evidence by retinoscopy of far-sightedness in fishes, he assumed that retinoscopic reflexion occurs from the front retinal surface and thus falsely concluded that fishes are near sighted. By examining the eye through a +10 dioptre lens with a dissecting microscope equipped for vertical illumination, Baylor and Shaw4 found that the reflexion comes from the guanine layer behind the retina. On the other hand, far-sightedness in fishes was reported by Rochon-Duvigneaud5 and Verrier6,7. Moreover, Verrier7 found that on replacing the back of the retina with a screen, the image focused on the screen.

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  1. 1

    Beer, T., Pflügers Arch. ges. Physiol., 58, 523 (1894).

  2. 2

    Walls, G., The Vertebrate Eye (Cranbrook Inst. of Science, Cranbrook, Michigan, 1942).

  3. 3

    Brett, J. R., The Physiology of Fishes (edit. by Brown, M. E.), 2, 121 (1957).

  4. 4

    Baylor, E. R., and Shaw, E., Science, 136, 157 (1962).

  5. 5

    Rochon-Duvigneaud, A., Les Yeux et la Vision des Vertébrés (Masson et Cie, Paris, 1943).

  6. 6

    Verrier, M. L., Bull. Soc. Zool. France, 59, 535 (1934).

  7. 7

    Verrier, M. L., Ann. Biol. Paris, Ser. 3, 24, 209 (1948).

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  1. Woods Hole Oceanographic Institution, Woods Hole, Massachusetts



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