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Why do Animal Eyes have Pupils of Different Shapes? (Data Files) Open Access

There is a striking correlation between terrestrial species' pupil shape and ecological niche (i.e., foraging mode and time of day they are active). Species with vertically elongated pupils are very likely to be ambush predators and active day and night. Species with horizontally elongated pupils are very likely to be prey and to have laterally placed eyes. Vertically elongated pupils create astigmatic depth of field such that images of vertical contours nearer or farther than the distance to which the eye is focused are sharp while images of horizontal contours at different distances are blurred. This is advantageous for ambush predators to use stereopsis to estimate distances of vertical contours and defocus blur to estimate distances of horizontal contours. Horizontally elongated pupils create sharp images of horizontal contours ahead and behind creating a horizontally panoramic view that facilitates detection of predators from various directions and forward locomotion across uneven terrain

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Resource type

Dataset

Contributors

Creator: Love, Gordon ¹
Contact person: Love, Gordon ¹

¹ Durham University

Funder

Engineering and Physical Sciences Research Council

Research methods

Other description

Keyword

optics
vision

Subject

Location

Language

Cited in

Identifier

ark:/32150/736664852
doi:10.15128/736664852

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All rights reserved All rights reserved

Publisher

Durham University

Date Created

2015-07-23T16:16:00.000+00:00

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S. Palucha

Date Uploaded

12 October 2015, 14:10:32

Date Modified

20 July 2017, 12:07:32

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File size: 11482435

Last modified: 2017:07:20 12:30:56+01:00

Filename: 736664852.zip

Original checksum: 36ee70994f9d1e7819ac9eb21afe18c2