Ira Posted August 26, 2010 Report Share Posted August 26, 2010 Post pics of them... No, I don't have a particular reason. Quote Link to comment Share on other sites More sharing options...
supasi Posted August 26, 2010 Report Share Posted August 26, 2010 Eye will play Quote Link to comment Share on other sites More sharing options...
hovmoller Posted August 26, 2010 Report Share Posted August 26, 2010 Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted August 26, 2010 Report Share Posted August 26, 2010 (baby is almost all eye ) Quote Link to comment Share on other sites More sharing options...
Joshlikesfish Posted August 26, 2010 Report Share Posted August 26, 2010 Wow P44 Quote Link to comment Share on other sites More sharing options...
Zev Posted August 27, 2010 Report Share Posted August 27, 2010 Quote Link to comment Share on other sites More sharing options...
Joshlikesfish Posted August 27, 2010 Report Share Posted August 27, 2010 Loving the ?Gobby? at the end Quote Link to comment Share on other sites More sharing options...
Zev Posted August 27, 2010 Report Share Posted August 27, 2010 I think it is a Blennie, it is in the LFS down here. Quote Link to comment Share on other sites More sharing options...
axolotl-danio Posted August 27, 2010 Report Share Posted August 27, 2010 Quote Link to comment Share on other sites More sharing options...
Zev Posted August 27, 2010 Report Share Posted August 27, 2010 Hey! You cannot post that pic here - it has no eyes Quote Link to comment Share on other sites More sharing options...
MarkLB Posted August 27, 2010 Report Share Posted August 27, 2010 Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted August 28, 2010 Report Share Posted August 28, 2010 Took some more - Quote Link to comment Share on other sites More sharing options...
DennisP Posted August 28, 2010 Report Share Posted August 28, 2010 Whats the flap of skin in the middle of a pleco's eye for??? :-? Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted August 28, 2010 Report Share Posted August 28, 2010 ??? Quote Link to comment Share on other sites More sharing options...
Joshlikesfish Posted August 28, 2010 Report Share Posted August 28, 2010 I think he means the thing inbetween the eyes Quote Link to comment Share on other sites More sharing options...
DennisP Posted August 28, 2010 Report Share Posted August 28, 2010 Yeah. In the eyes. Sorry. Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted August 28, 2010 Report Share Posted August 28, 2010 Most lorracids have that. just is the eye. Quote Link to comment Share on other sites More sharing options...
Zev Posted August 29, 2010 Report Share Posted August 29, 2010 It is called an Omega Eye, it is a modification of the shape of the iris that contracts or expands over the centre of the pupil to limit the amount of light entering the eye. It is believed that the pupil of most fish do not expand and contract like human eyes do, so they cannot limit light in this manner. The name is based on the upturned Greek character omega Ω. This type of eye is also present in rays, so may be a modification for fish whose eyes generally point upward, rather than being on the side of the head and not subject to light from the surface in the same way. Quote Link to comment Share on other sites More sharing options...
Ira Posted August 29, 2010 Author Report Share Posted August 29, 2010 I think he means the thing inbetween the eyes Between the eyes? I think they're nostrils... Quote Link to comment Share on other sites More sharing options...
DennisP Posted August 29, 2010 Report Share Posted August 29, 2010 It is called an Omega Eye, it is a modification of the shape of the iris that contracts or expands over the centre of the pupil to limit the amount of light entering the eye. It is believed that the pupil of most fish do not expand and contract like human eyes do, so they cannot limit light in this manner. The name is based on the upturned Greek character omega Ω. This type of eye is also present in rays, so may be a modification for fish whose eyes generally point upward, rather than being on the side of the head and not subject to light from the surface in the same way. This is what I was meaning. =p Thanks Zev. Quote Link to comment Share on other sites More sharing options...
Joshlikesfish Posted August 29, 2010 Report Share Posted August 29, 2010 My bad haha Quote Link to comment Share on other sites More sharing options...
Sunbird73 Posted August 30, 2010 Report Share Posted August 30, 2010 It is believed that the pupil of most fish do not expand and contract like human eyes do, so they cannot limit light in this manner. In mammals it is the iris that contracts to enlarge the size of the pupil also. The pupil is just a hole... the iris is the muscle. I found this The dilated, round pupils of a species of suckermouth armoured catfish (Liposarcus pardalis) constrict slowly on illumination (over 35-40 min) to form crescent-shaped apertures. Ray tracing of He—Ne laser beams shows that the lenses of a related species (Pterygoplichthys etentaculus), which also has a crescent-shaped pupil, are well corrected for longitudinal spherical aberration, suggesting that the primary purpose of the irregular pupil in armoured catfish is not to correct such aberration. It is suggested that the iris operculum may serve to camouflage the pupil of these substrate-dwelling species. Interesting! Quote Link to comment Share on other sites More sharing options...
Zev Posted August 30, 2010 Report Share Posted August 30, 2010 True about the iris - but they always say the pupil is dilated, not the iris has expanded for some wierd reason :roll: I had to take some photographs of my Mother's iris when it got damaged after cataract and macular hole surgery, they wanted to match the colour for a patch to be attached to the iris because too much light was getting in and disrupting her vision. The variation of colour and 'texture' is interesting. The patch was not quite correct colour in either, but it does the trick. Quote Link to comment Share on other sites More sharing options...
Sunbird73 Posted August 30, 2010 Report Share Posted August 30, 2010 I had to take some photographs of my Mother's iris when it got damaged after cataract and macular hole surgery, they wanted to match the colour for a patch to be attached to the iris because too much light was getting in and disrupting her vision. The variation of colour and 'texture' is interesting. The patch was not quite correct in colour either, but it does the trick. Amazing what they can do surgically, but it also serves to highlight how absolutely incredible eyes are and irises (irissess? iri? ) are just fascinating windows to the soul Quote Link to comment Share on other sites More sharing options...
Zev Posted August 30, 2010 Report Share Posted August 30, 2010 My specialist keeps ranting on about laser surgery for my somewhat dismal eyesight - but despite wearing contact lenses, having someone fiddling around in me eyes with one of those things gives me the willies, needless to say, he has given up on that dialogue, but now he says what they are doing in the States is cataract surgery to correct myopic vision. Quote Link to comment Share on other sites More sharing options...
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