Eye Definition and 263 Threads

Homework Statement The eye of a hurricane passes over Grand Bahama Island. It is moving in a direction 60.0° north of west with a speed of v1 = 37.0 km/h. Exactly three hours later, the course of the hurricane shifts due north, and its speed slows to v2 = 27.0 km/h, as shown in Figure 3-30...

My left eye has started twitching and it's making me crazy. Let's see, Medline says "The most common things that make the muscle in your eyelid twitch are fatigue, stress, and caffeine. Ok, guilty of all three. The caffeine I can control, I'm doomed on the other two. Would anyone like to...

Homework Statement Joe is hiking through the woods when he decides to stop and take in the view. He is particularly interested in three objects: a squirrel sitting on a rock next to him, a tree a few meters away, and a distant mountain. As Joe is taking in the view, he thinks back to what he...

Tanya is sitting in an optometrist’s chair, facing a mirror that is 2.25 m from her eyes. It the eye chart she is looking at is hanging a wall behind her head, 1.75 m behind her eyes. How far from her eyes does the chart appear to be?

I've noticed that most animals have irises that fill the entire eye,but humans do not. Does anyone have an explanation for this? Does our sclera provide us something unique? What's the adaptive function one way or the other? This question has been bugging me for weeks. Thanks

Hey In each eye there is a blind zone, and the eyes complete each others blind zone But now how come : when i close one eye, and open one i don't have any black in the view i have because the closed eye gives me a totally black image so on the side of opened eye : i should have a...

hi, i was just wandering what colour you see best in a why?, i mean if a room was to be flooded in red blue or green what would be the best for the resolving power of the eye. thank you very much, alex

my left eyes got red since thursday and hasnt got well. it just gets worst when i work a lot with it but even though i don't work hard with it its still red! my right eye was red as well but a bit less and now it gets well totally but my left eye:confused:

I've heard this a lot - that you lose depth perception when looking out of only one eye. So I have to ask - is this true? When I try it everything looks exactly the same to me. :confused:

http://www.newscientisttech.com/article/dn11200?DCMP=Matt_Sparkes&nsref=bionic-eye Title : Better 'bionic eye' offers new hope of restored vision A tiny electronic pad is placed onto the retina of one eye, so that the electrodes are in direct contact with the ganglion cells. Each of the...

I have read somewhere that motion on TV is really a series of still pictures presented very fast in succession but forgot the minimum number of still pictures / second to just allow us to perceive motion. What is that number? I also realize that power supplied to our homes is in the form of...

I was wondering how far away the stars are at night that can be seen by the naked eye. I would venture to guess that the galaxies that are billions of light years away must be seen with a high tech telescope. o| Hiram

http://www.cbc.ca/arts/film/story/2006/11/16/clooney-people.html

Any help or simply reasons why my answer is incorrect would help greatly, thanks! Question: A projectile is fired from a horizontal spring-loaded gun aimed directly (along the line of sight) at a distant bull’s eye. Because of the pull of gravity during flight, the projectile misses and hits...

No, no, no. A friend sent this to me and it's just wrong. For one thing, it says dogs can't do brain surgery. Sorry, but my dog aka The Fruitbat" has been performing brain surgery on the cats for two years. He almost killed Dr Foofer. He drills holes in the sides of their heads, but I...

hey all I've read a couple articles about eye color changing with ageing, well here's the thing i have brown eyes but my father which is 48 has light brown kind of hazel looking eyes and my mom brown.I was wondering sense I am 16 will my eye color change as i grow older?

Hello. Does anyone here use and LED light for their desk? I am a college student and spend a lot of time at my desk reading. I get pretty bad eye strain from reading so much. I am thinking about getting one of these LED lamps. Also, does anyone use any other type of lamp that is better...

I have a problem thinking about rotations. As we all know, it takes 360 degrees to complete a circle, 720 to do two rotations, 1080 for three full rotations, 1440 degrees for four and 1800 for five and so on. My question is, what is the amount of complete rotations a human eye can see in one...

hey how would you work out resolution of an human eye at defeerent distances looking at 2 lines 0.25mm apart? cheers alex

hi, I've just done an experinemt to try and show the resolution of the human eye in different light levels. i did it by putting a 0.25mm apart slits in a tube then, behind it had an adjustbable light, then i moved the slit further back, and asked them to say if they could see the two slits...

OK - here's something I'd like to "see" before I'm worm food... Since a fairly modest percentage of the world population either now regularly uses or will eventually use some type of eye glasses, I'm surprised that there isn't a clamor to develop an affordable, "smart", variable/tunable focal...

When I get tired it looks like the blood vessels in my eye swell up, why? Are they in the sclera?

an acher shatneds 40m away from his target. If the arrow is shot horizontally with a velocity of 90m/s how far above the bull's eye must he aim to compensate for gravity pulling down. No air resistance and I guess the target is level with him.

I've noticed something a bit odd when I use an eye dropper in one of my labs. If I pull up water near the middle of the container, the water will fill up to a certain level. Now if I bring the eye-dropper down and touch the buttom (effectively putting it in a position to suck up the wall of...

For any of you thinking of trying this at home, let me tell you this is not fun. I accidentally jabbed myself in the eye a couple of weeks ago, and after a couple of minutes of screaming in pain, I thought it was over. But last week, I started having this hard eye-twitch and some pain in my...

I have no doubts that the eye colors of infants can change during the first several months of life. I've got my own proof in my sibling's (and my own) baby pictures. But what about years later, like adolescence or even adulthood? I know people who say their eye colors change depending on...

I am extremely stuck on this question and do not know how to go about it. Could somebody help me? 1. (a) If the human eyeball is 4cm from lens to retina, what is the range of the power and focal length of the eye lens when focussing an object an infinite distance away and one at the normal...

*What is the resolution (in megapixels) of the human eye?

Word problem ! Hi , This is a Hw question i have am stuck on i don't know how to solve it ... A pharmacist is to prepare 16 milliliters of special eye drops for a glaucoma patient. The eye-drop solution must have a 5% active ingredient, but the pharmacist only has 10% solution and 1%...

http://www.venezuelanalysis.com/news.php?newsno=1736

A question to people coupling lasers to optical fibers. What is the power and exposure time of laser beam directed in the eye which is considered dangerous? The ones I´m currently working with are 15 mW. Are there any ways to couple laser beam to a fiber without having to look into another end...

What if I said the only reason there is order and events is because we precieve it that way.

The eye has 3 cones(RG,GY,B-component theory)...and bipolar cells( use the opponent theory). From these 3 types of cones how does the brain interpret the multiple of colors that occur...and how would one convert the wavelength(lambda) to RGB values or from RGB values to wavelength. for...

When near another person, how do you meet their eye(s)?

Me and my friends are having a discussion on Hurricanes and the question came up if one was to detonate nuclear missile into the eye of a hurricane. what would happen ,some said the hurricane would get larger and more powerful. Is there some sort of answer to this? Maybe also a mathematical...

My next door neighbor has suddenly gone blind in one eye and has only blurred vision in the other, how can this happen so suddenly.

We've all experienced REM. I notice that while awake, with eyes closed (or even open!), I can generate a sequence of images by allowing my eyes to integrate together the present image with my semiconscious lucid thoughts. For instance, I might visualize a vacation spot in the Black Forest and...

I know that crop circles have been discussed to death but, has all the data gleaned from the investigations of these anomalies shown that they are hoaxes ie the node explosions?

People are often attracted to eyes; however, do eyes diminish in beauty over time, like other physical attributes? If not, do marriages last longer among couples who both have, according to culture, beautiful eyes?

Gene Therapy Can you use gene therapy to change eye color (or something other than that to permanently change eye color) or is gene therapy not available for that yet?

Just a litle of curiosity as to whether or not dogs also have different eyed colors as humans ? Thank you

A human eyeball is about 2 cm long and the pupil has a maximum diameter of about 5 mm. What is the speed of this lens? f-stop = 2 cm / .5 cm f-stop = 4 is this it? I'm not sure if I found the right formula in my book thanks

I got a airbrush for my birthday. I've never even held one before so I probably should have read the instructions. I don't have a compressor so I got a can of Propel, which appears to be full of butane. Anyway, I hooked the hose up to the can first, instead of to the airbrush first. As soon as I...

When I saw the thread on eye meds, it encouraged me to ask something I've been wondering about. My wife has been nearsighted most of her life, and then at age 49 she started having trouble reading. She wears contacts, so her optometrist gave her a prescription for one contact for her...

i just want to know, does the lens which present in the eye consider as living or non-living ? please can u provide me with a proper explanation. thenk you

I have some ideas about the eye sicknesses. But, I couldn't find the maximum pressure for veins that are in eye sphere for STP. What do you think?

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...

http://www.eyetricks.com/fcount.htm

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...