File:Olhos de um gato-2.jpg
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Size of this preview: 669 × 600 pixels. Other resolutions: 268 × 240 pixels | 535 × 480 pixels | 857 × 768 pixels | 1,142 × 1,024 pixels | 1,789 × 1,604 pixels.
Original file (1,789 × 1,604 pixels, file size: 2.15 MB, MIME type: image/jpeg)
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Attribution information, such as the author's name, e-mail, website, or signature, that was once visible in the image itself has been moved into the image metadata and/or image description page. This makes the image easier to reuse and more language-neutral, and makes the text easier to process and search for. Commons discourages placing visible author information in images.
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| Description | "Unlike human eyes, which work best in day light, the cat’s eyes must function well in extremely low light condition and as such are well suited to an animal that is predominantly nocturnal and crepuscular in activity. In darkness, cats eyes are able to function in approximately one-sixth of the light needed for human vision. However they must also be able to function well in daylight – so just how is this achieved. In low light levels the cats pupil must be able to open as wide as possible, but also be able to contract to very small size to protect the sensitive retina in bright sunlight. In human eyes, this size variation of the pupil is controlled by a circular ciliary muscle, but this limits the amount of size variation. In cats however, the same process is controlled by two, shutter-like ciliary muscles, which gives the cat it’s characteristic slit-like pupil in bright light conditions. " |
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| Other versions | Derivative works of this file: Olhos de um gato-3.jpg |
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: cropped. The original can be viewed here: Olhos de um gato.jpg:  .
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This image is a derivative work of the following images:
- File:Olhos_de_um_gato.jpg licensed with Cc-by-sa-2.0, Cc-by-sa-2.0/pt
- 2009-08-24T06:55:09Z Tm 2676x1792 (2084106 Bytes) {{Information |Description="Unlike human eyes, which work best in day light, the cat’s eyes must function well in extremely low light condition and as such are well suited to an animal that is predominantly nocturnal a
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 22:43, 25 August 2009 | | 1,789 × 1,604 (2.15 MB) | Tm (talk | contribs) | {{Information |Description="Unlike human eyes, which work best in day light, the cat’s eyes must function well in extremely low light condition and as such are well suited to an animal that is predominantly nocturnal and crepuscular in activity. In |
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