Marine & Environmental Sciences Faculty Articles
A Novel Vertebrate Eye Using Both Refractive and Reflective Optics
Document Type
Article
Publication Title
Current Biology
ISSN
0960-9822
Publication Date
1-27-2009
Keywords
SYSNEURO
Abstract
Sunlight is attenuated rapidly in the ocean, resulting in little visually useful light reaching deeper than ∼1000 m in even the clearest water [1]. To maximize sensitivity to the relatively brighter downwelling sunlight, to view the silhouette of animals above them, and to increase the binocular overlap of their eyes, many mesopelagic animals have developed upward-pointing tubular eyes [2-4]. However, these sacrifice the ability to detect bioluminescent [5] and reflective objects in other directions. Thus, some mesopelagic fish with tubular eyes extend their visual fields laterally and/or ventrally by lensless ocular diverticula, which are thought to provide unfocused images, allowing only simple detection of objects, with little spatial resolution [2-4]. Here, we show that a medial mirror within the ventrally facing ocular diverticulum of the spookfish, Dolichopteryx longipes, consisting of a multilayer stack derived from a retinal tapetum, is used to reflect light onto a lateral retina. The reflective plates are not orientated parallel to the surface of the mirror. Instead, plate angles change progressively around the mirror, and computer modeling indicates that this provides a well-focused image. This is the first report of an ocular image being formed in a vertebrate eye by a mirror.
DOI
10.1016/j.cub.2008.11.061
Volume
19
Issue
2
First Page
108
Last Page
114
Additional Comments
NSF grant #: IBN-0343871
NSUWorks Citation
Hans-Joachim Wagner, Ron H. Douglas, Tamara M. Frank, Nicholas W. Roberts, and Julian C. Partridge. 2009. A Novel Vertebrate Eye Using Both Refractive and Reflective Optics .Current Biology , (2) : 108 -114. https://nsuworks.nova.edu/occ_facarticles/451.
Comments
©2009 Elsevier Ltd. All rights reserved.