Turtles are thought to have exceptional night vision due to the unusually large number of rod cells in their retinas.

Shark eyes are similar to the eyes of other vertebrates, including similar lenses, corneas and retinas, though their eyesight is well adapted to the marine environment with the help of a tissue called tapetum lucidum.

The diving beetle Thermonectus marmoratus has recently become notable when it was discovered that its aquatic larval stage has been found to have used in its principal eyes two retinas and two distinct focal planes that are substantially separated, in the manner of bifocals to switch their vision from up-close to distance, for easy and efficient capture of their prey, mostly mosquito larvae.

Some species have at least 16 different photoreceptor types, which are divided into four classes ( their spectral sensitivity is further tuned by colour filters in the retinas ), 12 of them for colour analysis in the different wavelengths ( including four which are sensitive to ultraviolet light ) and four of them for analysing polarised light.

Whereas some other jellyfish do have simple pigment-cup ocelli, box jellyfish are unique in the possession of true eyes, complete with retinas, corneas and lenses.

Hawks, including the accipitrines, are believed to have vision several times as sharp as that of the human species, in part because of the great number of photoreceptor cells in their retinas ( up to 1, 000, 000 per square mm, against 200, 000 for humans ), a very high number of nerves connecting the receptors to the brain, and an indented fovea, which magnifies the central portion of the visual field.

Hartline investigated the electrical responses of the retinas of certain arthropods, vertebrates, and mollusks because their visual systems are much simpler than those of humans and are thus easier to study.

One may explain ( human ) vision by noting that light from the outside world forms an image on the retinas in the eyes and something ( or someone ) in the brain looks at these images as if they are images on a movie screen ( this theory of vision is sometimes termed the theory of the Cartesian Theater: it is most associated, nowadays, with the psychologist David Marr, see also: solipsism ).

The glasses function according the properties of the optic tract, whereby the right halves of both retinas ( which see the left side of the field of view ) are each connected to the right hemisphere, and the left halves ( which see the right side of the field of view ) are each connected to the left hemisphere, via optic nerves, which partially cross at the optic chiasm.

He has been described by some as being somewhat of a Shane Schofield gone wrong, possessing skills and reputation similar to Schofield while using his abilities independently ; like Schofield, he regularly wears specially tinted glasses due to occular damage, although in his case the glasses are amber-tinted anti-flash glasses due to an eye condition which makes his retinas too sensitive to natural light, rather than Schofield's being the result of torture.

This can be defined theoretically as the points in space which are imaged on corresponding points in the two retinas, that is, on anatomically identical points.

* Vergence Movements or convergence are the movements of both eyes to make sure that the image of the object being looked at falls on the corresponding spot on both retinas.

Physiological aspects that are used include fingerprints, eye retinas and irises, voice patterns, facial patterns, and hand measurements.

Medical researchers have confirmed that the retinas of 100 year-old residents are often comparable with those of 45 year-old city-dwellers.

Severe nearsightedness ( high myopia ) is sometimes present, as are other eye problems that can affect vision such as detached retinas.

Their retinas include rod cells and two types of cone cells, corresponding to peak sensitivity in the green and ultraviolet regions of the spectrum.

In contrast to duplex retinas, pure rod and pure cone retinas have only rods or cones, respectively.

The difference between vertebrate and cephalopod retinas presents an interesting puzzle of evolutionary path which is not yet fully settled.

Additionally, the brightness of the weld area leads to a condition called arc eye in which ultraviolet light causes the inflammation of the cornea and can burn the retinas of the eyes.

Additionally, the brightness of the weld area can lead to a condition called arc eye, in which ultraviolet light causes inflammation of the cornea and can burn the retinas of the eyes.

Exposure to the brightness of the weld area leads to a condition called arc eye in which ultraviolet light causes inflammation of the cornea and can burn the retinas of the eyes.

Also, weaker electrical activity is found in the retinas of depressed people, which gives them poor visual contrast so that they see the world in grey, depressing hues.

One of Alfred Hitchcock's unproduced projects was The Blind Man, a variant of the theme in which a blind pianist receives implanted eyes whose retinas retain the image of their previous owner's murder.

When he recognized Batman, the warehouse exploded and Reardon's retinas were burned, which impacted his war injury and blinded him permanently in both eyes.

The many blind people who do entrain to the 24-hour light / dark cycle have eyes with functioning retinas including operative non-visual light-sensitive cells.

It is able to see as far away as, but because its retinas only contain cones, it is thought to have poor night vision.

For example, vision involves light striking the retinas of the eyes, smell is mediated by odor molecules and hearing involves pressure waves.

A micro-spectrophotometry study of 17 species of shark found 10 had only rod photoreceptors and no cone cells in their retinas giving them good night vision while making them colorblind.

Transplantation of retinas has been attempted, but without much success.

A recent University of Pennsylvania study calculated the approximate bandwidth of human retinas is 8. 75 megabits per second, whereas guinea pig retinas transfer at 875 kilobits.

L-AAAD activity in rat retinas is modulated by environmental light, and this modulation is associated with dopamine D1 receptors and alpha 2 adrenoceptors.

" This was confirmed in the seventies by Marshall W. Nirenberg's work on chick retinas and later on Drosophila melanogaster larvae.

Magpie attacks can cause injuries, typically wounds to the head and particularly the eyes, with potential detached retinas and bacterial infections from a beak used to fossick in the ground.

Newer studies, though, have found that it is toxic to photoreceptor cells in rats ' retinas and increases tumours in white mice.

If an object is far away, the disparity of that image falling on both retinas will be small.

At the time, detached retinas meant automatic retirement for fighters, and Mouzon had to retire at the young age of 19.

I have just asked these questions in the Pentagon, in the White House, in offices of key scientists across the country and aboard the submarines that prowl for months underwater, with neat rows of green launch tubes which contain Polaris missiles and which are affectionately known as `` Sherwood Forest ''.

They are preoccupied riding herd on control panels, switches, flashing colored lights on pale green or gray consoles that look like business machines.

The grass and fields of rice are perfectly green, and herds of cattle are everywhere feeding on the banks of the river, and the natives are scattered about differently employed.

The sand is fine and pleasant, the cabanas are clean, and the parasols, green, raspberry, and butter yellow, are very gay.

Around that statue in the green park where children play and lovers walk in twos and there is a glowing view of the whole city, in that park are the rows of marble busts of Garibaldi's fallen men, the ones who one day rushed out of the Porta San Pancrazio and, under fire all the way, up the long, straight narrow lane to take, then lose the high ground of the Villa Doria Pamphili.

By comparison, Stone Harbor bird sanctuary's allies seem less formidable, for aside from the Audubon Society, they are mostly the snowy, common and cattle egrets and the Louisiana, green, little blue and black-crowned herons who nest and feed there.

When different colors are used, she is just as likely to color trees purple, hair green, etc..

While 2-year-olds are still gaining most of the attention at the track, green horses are starting to go a bit, and Jimmy Cruise has several that can really make it.

The video signal is amplified and then switched, in synchronism with the three ultraviolet light sources which are sequenced by the rotating mirror so that during one-twentieth of a second only one wavelength, corresponding to red, green, or blue, is seen.

It is not difficult to see that the stamens of the catkin are always arranged in pairs, and that each individual flower is nothing but one such pair standing on a green, black-tipped little scale.

He said `` Morris County is rapidly changing and unless steps are taken to preserve the green areas, there will be no land left to preserve ''.

Words primarily used in Austria are Jänner ( January ) rather than Januar, heuer ( this year ) rather than dieses Jahr, Stiege ( stairs ) instead of Treppe, Rauchfang ( chimney ) instead of Schornstein, many administrative, legal and political terms – and a whole series of foods and vegetables such as: Erdäpfel ( potatoes ) German Kartoffeln ( but Dutch Aardappel ), Schlagobers ( whipped cream ) German Schlagsahne, Faschiertes ( ground beef ) German Hackfleisch, Fisolen ( green beans ) German Gartenbohne ( but Czech fazole and Italian fagioli ), Karfiol ( cauliflower ) German Blumenkohl ( but Italian cavolfiore ), Kohlsprossen ( Brussels sprouts ) German Rosenkohl, Marillen ( apricots ) German Aprikosen but Slovak marhuľa, Paradeiser ( tomatoes ) German Tomaten, Palatschinken ( pancakes ) German Pfannkuchen ( but Czech palačinky ), Topfen ( a semi-sweet cottage cheese ) German Quark and Kren ( horseradish ) German Meerrettich ( but Czech křen ).

As an example, heavier halogens are darker than are halogens of lesser atomic weight – fluorine is nearly colorless, chlorine is bright green, bromine is brown, and iodine is dark gray / violet.

Poirot has dark hair, which he dyes later in life ( though many of his screen incarnations are portrayed as bald or balding ), and green eyes that are repeatedly described as shining " like a cat's " when he is struck by a clever idea.

The young twigs are green at first, becoming purplish where exposed to sunlight, then grey in their second year.

Arms of a Roman Catholic abbot are distinguished by a gold crozier with a veil attached and a black galero with twelve tassels ( the galero of a territorial abbot would be green )

Highly polished New Zealand pāua shells are extremely popular as souvenirs with their striking blue, green, and purple iridescence.