An Eagle's Eye: Quality of the Retinal Image
@article{Shlaer1972AnEE, title={An Eagle's Eye: Quality of the Retinal Image}, author={Robert Shlaer}, journal={Science}, year={1972}, volume={176}, pages={920 - 922} }
The optical quality of a living eagle's eye was determined by an ophthalmoscopic method. The performance of the eye was substantially better than that reported for humans, but did not confirm some of the wilder claims made for such birds.
62 Citations
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References
SHOWING 1-10 OF 21 REFERENCES
THE RELATION BETWEEN VISUAL ACUITY AND ILLUMINATION
- PhysicsThe Journal of general physiology
- 1937
The relation of visual acuity and illumination for two trained observers was measured and the conclusion that detail perception is a function of a distance rather than an area is made.
VISUAL ACUITY AND ILLUMINATION IN DIFFERENT SPECTRAL REGIONS
- PhysicsThe Journal of general physiology
- 1942
Measurements with the C show that when intensity discrimination at the retina is experimentally made the limiting factor in resolution, visual acuity is improved by conditions designed to increase image contrast, but intensity discrimination cannot be the limiting factors for the ordinary test object resolution.
Spherical aberration and the information content of optical images
- PhysicsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
- 1957
The main purpose of the paper is to investigate the effect of spherical aberration on the information content of low-contrast photographic images with specified spread and noise characteristics. In §…
THE VERTEBRATE EYE
- MedicineThe British journal of ophthalmology
- 1943
The list of conditio'ns which Major Wright indicates may be included in Parinaud's oculoglandular syndrome lends support to his view that this syndrome is liberal in its clinical confines; it would seem that such a label can' add little information to a particular case.
Treatise on Physiological Optics
- Physics
- 1962
A composite thin film resistor is disclosed, including an electrically inert substrate upon which is deposited a nickel-chromium alloy thin film, and an overlying second thin film - which is initially deposited as metallic tantalum - which provides a very high degree of environmental protection with respect to the Ni-Cr film.
The Retina (Univ. of Chicago Press, Chicago, 1941); The Vertebrate
- Visual System (Univ. of Chicago Press,
- 1957
The Vertebrate Eye (Cranbrook Institute
- 1942