retina,cornea,iris etc are found where?they live together (in the same area).where is that place?
121422
In your eyes. But vision actually takes place at the back of the brain.
375836
Hi there, i don't know how old are you so can't decide on how technical i can be in answering this question. Any way i shall try to be simple.\nThe coloured (black, blue, green or whatever) part of the eye is called the IRIS (not pupil).  It is a shutter that guards the tiny hole in its center(this hole is actually called pupil). \nThe iris prevents too much of light from entering the eyes.It also helps animals and man to see better in darkness. The blackish pigment that colours your iris is MELANIN and its the same colouring agent that gives tan to your skin. Some people have deep melanin pigmentation on their iris and hence they have blackish iris. in some people, the amount of this pigment is a bit low, hence, their eyes seem brown. When the amount of colour is much lower, the eyes appear more bluish yellowish or greenish.\nIts actually the total absence of melanin that makes some eyes look blue or green. \nok, then thats all....\nGood bye!
639414
C. At the Fovea\nThe fovea is the centermost point in the macula, and responsible for our central, sharpest vision known as MACULA LUTEA
565691
about 60-75% everybody's body protein is basically the same DNA but because each of us have subtle diffrences the Proteins and Amino Acids combine differently. Sometimes the transplants are not always successful for that reason. It is not easy to find a 100%match because like snowflakes everybody is different. Hopefully if people would stop being so closed-minded , religiously over zealous, and ignorant about STEM CELL RESEARCH maybe we can solve a lot more problems like this one. Until then check out this book:\n\n                    THE EYE CARE REVOLUTION By Dr. Robert Abel Jr.
201967
It is called an Iris Nevus, which means it is a freckle. I have one also and didnt know what it was until recently. My eyes are very  green and the "freckle" is  kinda reddish brown and located near the pupil and about the same size, as the pupil of my right eye. I was told it is nothing to worry about unless it does change. I have listed some sites that I  found to be informative. Hope this helps you. Blessings :)
43326
I know what is it...\n\nYour eye's retina rented...\n\nIT IS VERY SERIUS PROBLEM.CLOSE YOUR COMPUTER AND YOUR EYE.\n\nGO TO DOCTOR IMMEDIATELY!!!!!
476733
same place chromosomes split and begin to migrate.\nyou tell me.
611216
whitch at? as i nthe location
424089
They're found in pairs in normal cells and singles in gametes.
616378
YES, into the deeper compartments of the eye.....\n\nThe cornea is the clear lens on the outside of the eye.  It is dome shaped and has clear watery fluid (aqueous humor) inside. If something got into this anterior chamber of the anterior cavity, it would be able to float to-thru the hole in the iris (pupil) and maybe then get into some more aqueous humor, then bump into the lens and then deeper to the vitreous gel in the posterior cavity of the eye and eventually get to the retina. \n\nMy uncle had a small piece of dirt gravel do this...it entered cornea and went all the way thru these many layers of fluid and gel and then it detached his retina.  He has been blind in that eye for decades. He was about 20 when it happened. He's in his early 60s now. That eye also has a cataract now too.
132901
Interesting! You've already gotten some good answers, but I'll add my two cents.\nI think that, more than being related specifically to food-habits, this trait is related to habitat and overall habitus (which includes not only food type but also food consecution mechanisms, locomotor type and other characteristics of habitat use). And of course, to evolutionary history. All lineages have adaptations and constraints of their own.\nAs a basic consideration, most animals that live in terrestrial habitats move in a mostly 2-dimensional world. Flying and climbing animals are the exception, as well as those that may expect predators to come from above. Aquatic environments, on the other hand, are always very much 3-dimensional.\n\nIf we consider vertebrates (which I guess it's what your question was aiming at), most have eyes placed more or less laterally on the head, ensuring an extensive vision field with some (small) binocular central area. Of course, the tradeoff for lateralised eyes is that reduced superimposition of both eyes' fields, thus lesser binocular vision. In the same manner, frontal eyes reduce the total field of vision.\nA (very partial) list of terrestrial vertebrates with frontal eyes and/or enhanced stereopsis (binocular vision):\n\n-Plethodontid salamanders.\n-Chameleons, geckoes, varanids (Komodo dragons), and many arboreal snakes, among reptiles.\n- Strigiformes (owls) and Falconiformes (eagles, hawks...), but also the kakapo, a nocturnal Australian parrot, and the frogmouths (Caprimulgiformes Podargidae). \n-Many generalized marsupials such as opossums; primates and felids.\n\nNot all these animals are predators, and there are several predators with lateral eyes and mostly monocular vision. \nSo, in my opinion, the main factor is not so much what you eat, but how you get it and where you usually move.\n \nFor example, let's take the case of mammals. The earliest known fossils seem to have had nocturnal habits and partially frontal eyes, such as those seen today in opossums. From there, I can visualize different evolutionary paths tending to more laterally placed eyes in animals that have to avoid predators (such as many herbivores - e.g. hoofed mammals- , insectivores or omnivores), and more frontally placed eyes in mammals that require good 3-D vision, be it hunters (as felids) or species that move in a 3-D environment (primates), and/or have nocturnal activity. \n\nOther vertebrate groups have different evolutionary paths and adaptive histories. For instance, the eyes of all birds are extremely large in comparison with other vertebrates, with very wide vision fields; and all birds have binocular vision to some extent. Only specialized predator birds have frontal eyes, but I guess that all birds use their enlarged cerebellum to calculate distances on the basis of the 20-30º binocular field. \n\nAquatic fish-like vertebrates privilege wider vision angles, but there are fish with good binocular vision, such as the hammerhead sharks and also many deep-sea bony fish species. In the case of the first ones, it could be a predator specialization, whereas in the latter case it could be related to vision in low-light environments.\n\nArthropods have a different system altogether, and I think their adaptations and constraints merit a separate discussion (what an elegant way of avoiding it!). \n\nSo, although we like to identify patterns that allow us better understanding of the biological world, I don't think there is a direct relationship with a single factor. The list of possible factors influencing vision type includes:\n- phylogenetic history (including previous adaptations and constraints)\n- locomotor habit (running, flying, climbing)\n- feeding habit (including type of food and ways of searching for it)\n- diurnal/nocturnal activity\n\nI'm sure I'm leaving important things out... I'm not even sure if this all makes sense!\n\n-----------\nUpdate: Gianguru, you're amazing.
85752
1) At what latitude do you live?\n2) What time of night is it?\n3) What direction are you looking in the sky?\n4) How strong are background/city lights where you are?\n\nWhat you are experiencing is called "averted vision".  The portion of our retina most sensitive to faint light is not directly behind the pupil, but off to the side a bit.  You are looking at a deep sky object (star cluster, nebula or galaxy), but to know which one for certain, I need the answers to the above questions.  At this time of year, it is most likely the Pleiades or the Orion Nebula.
215318
Strabismus.  Tend to focus with one eye.
650288
what the hell does vision have to do with religion.  Its not our fault if he makes us blind or gives us poor eye sight.  what kind of religion are you a part of.\ndamn
602831
There are two types of cells. Rod & cone cells. Rod cells are responsible for black & white vision, cone cells for color vision. at the yellow spot, there are only cone cells, at the other areas of the retina, there are rod cells. At the blind spot, there is neither.
289206
I recently started trying eye exercises to help improve my vision. I created a blog so that people can follow my progress\n\nhttp://improvingmyeyesight.com/blog/\n\nThe program I am using is called the Vision for Life Program. Actually, the founder of the program, Orlin Sorensen, was also interested in flying, which is what got him interested in eye exercises.
288966
Having one's eyes not the same colour is known as heterochromia, and is usually the result of damage to one or other eye.\n----\nThe Q & A below is the best reference I could find:\nQuestion:\nI have Heterochromia iridis (different colored eyes, where one eye is of two colors), and I was wondering if there are statistics on how many other people have this trait? My particular case is independent of disease or disorder, but I was curious. \n \nAnswer:\nWe were unable to find a specific number for the frequency of heterochromia of the iris in the general population. Asymmetry in the pigmentation of the irides probably occurs as an isolated phenomenon inherited as a dominant trait. This means a parent with heterochromia of the iris has a 50/50 chance to pass the trait to their offspring.