Eyes are organs of the visual system. They provide animals with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light and convert it into electro-chemical impulses in neurons. In higher organisms, the eye is a complex optical system which collects light from the surrounding environment, regulates its intensity through a diaphragm, focuses it through an adjustable assembly of lenses to form an image, converts this image into a set of electrical signals, and transmits these signals to the brain through complex neural pathways that connect the eye via the optic nerve to the visual cortex and other areas of the brain. Eyes with resolving power have come in ten fundamentally different forms, and 96% of animal species possess a complex optical system. Image-resolving eyes are present in molluscs, chordates and arthropods.The most simple eyes, pit eyes, are eye-spots which may be set into a pit to reduce the angles of light that enters and affects the eye-spot, to allow the organism to deduce the angle of incoming light. From more complex eyes, retinal photosensitive ganglion cells send signals along the retinohypothalamic tract to the suprachiasmatic nuclei to effect circadian adjustment and to the pretectal area to control the pupillary light reflex.
I must have sucker written all over my face. Today when I went to work the plan was to have me using the GPS while the guy I work with used the robotic to check some construction that was taking place right underneath some power lines. After we started working he called me on the phone and said...
German researchers claimed to figured out the "Eye" evolutionary history
Hey guys;
There is an article on slashdot about German researchers that have claimed to have figured out the evolutionary history of the eye. Here is the quote from slashdot...
This has been bugging me for some time and I'd love to get a clearer picture. We know that photos from the various moon missions show a black sky without stars, and that has been explained to me before as resulting from the fact that those photos were taken in broad daylight, plus maybe the...
I have an LCD monitor for my computer and It seems to me that when up late a night and only having my monitor on no other lights it strains my eyes more. If I turn on a backround light would that help things, It seems to be less strain but I am not sure.
Lasers are being used to do many things now: eye correction, speed scaning, cutting, and now even to create iron!
Scientists now use lasers to heat up hydrogen so they fuse into helium and all the way up the table into iron, just like stars.
I want to know if lasers have mass. I know that...
Hello! Um...can anyone help me with this question?
A woman can see clearly with her right eye only when objects are between 40.0 cm and 177 cm away. Prescription bifocals should have what power (in Diopter) so that she can see distant objects clearly (upper part)? Assume that the glasses will...
hey i sort of lost my textbook and i don't know how to do this can someone help me out Please? If so here's the question:
The structure and function of the human eye and a simple camrea have many similarites. Useing the the terms iris,eyeball, retina , corena, and lens idnetify correspondying...
Eye Exam...
Try this its actually quite good.
Please don't cheat!
Count the number of F's in the following text:
FINISHED FILES ARE THE
RESULT OF YEARS OF SCIENTIFIC
STUDY COMBINED WITH THE
EXPERIENCE OF YEARS
Managed it?
Scroll down only after you...
i was just wondering, what is the equivelent megapixel rating of the human eye? i would expect the back of the eye to be around the size of a 35mm negative commonly rated at around 10mp, it can't be any bigger than a 120 film negative which is rated somewhere around 50mp.
is there any research...
Good morning ;
i'm an italian electronic technician , and i have spent many years studing various phenomenon of mistic and spirituality ... after years of study i have managed it , i have measured something and have the technical proof of my theory ... angels and demons exsist (don't think I'm...
Remember, remember the fifth of November
The gunpowder treason and plot.
I see no reason why gunpowder treason
Should ever be forgot.
Guy Fawkes, twas his intent
To blow up king and parliament.
Three score barrels were laid below
To prove old England's overthrow.
By God's mercy he...
out of curiosity, what are everyones views on revenge? justified? wrong? [?]
(i ask this because i have begun reading Shakespeare's tragedies (only Titus Andronicus so far) and in this era it seems to be a commonplace idea)
I have noticed while looking at my cat that there is a secondary membrane (first beign the mucus membrane covering his eye it is a little har do expsplain so if you have a cat pick it up and look at it's eye you will notice a white area beteen his outside eye and the side of it's nose. It it...