Optical Illusions

it gets bigger

i dont no ask ur parents . (mutters "freak")

An optical illusion (also called a visual illusion) is characterized by visually perceived images that differ from objective reality. The information gathered by the eye is processed by the brain to give a percept that does not tally with a physical measurement of the stimulus source. There are three main types of illusion - literal optical illusions that create images that are different from the objects that make them, physiological illusions that are the effects on the eyes and brain of excessive stimulation of a specific type - brightness, tilt, color, movement, and cognitive illusions where the eye and brain make unconscious inferences. for mine

Seen in the video above, gravity hills (also known as magnetic hills) are a phenomenon that occurs when a false horizon creates the illusion of moving against gravity.

If you drive over a gravity hill, you might feel like you're headed uphill, but if you let off of the gas pedal, you'll keep accelerating. Obviously, that makes for a fairly confusing experience; vehicles might seem to defy gravity, and on rainy days, water seems to rush back up the hill.

There are hundreds of gravity hills throughout the world. Prominent examples in the United States include Spook Hill (Fort Gaines, Florida), the Oregon Vortex (Gold Hill, Oregon), Mystery Hill (Boone, North Carolina), and our favorite, Booger Mountain (Cumming, Georgia).

As these colorful names imply, some people believe that gravity hills occur due to strange magnetic imbalances or supernatural influences. In reality, though, the phenomenon is fairly easy to explain: When traveling on the hill, you're actually on a slight downward slope, but the surrounding landscape gives the impression that you're traveling uphill. You can't see the horizon, so your brain infers that it's behind the "peak" of the hill.

The effect becomes more pronounced when other landscaping oddities come into play. For instance, if the trees surrounding the hill grow at a slight angle, they may appear to be perfectly straight, and drivers will have an even tougher time determining the slope of the land.

Essentially, humans need a clear view of the horizon in order to determine whether they're moving up or down. When the horizon is obstructed, we have trouble judging the slope of a surface. The effect even works if you know that you're being tricked--you'll still feel like you're defying gravity.

Albert Einstein said that time is an illusion.

because its like when u go on a ride at a carnival and u go on a spining ride then u might get a headache and its like the same with an illusion but you don't go on a ride and since usually in a illusoin like one that spins you look at it for a while and when you do that it gives you a headache and sometimes it has to do with your eyes and your brain so that's kind of why:)

The joke of that image is that if you cannot read it, you have bad eyes and therefore have not had sex for some time. Those that have had sex recently will have good eyes and be able to read the message.

They can if they are curved inward (concave). We frequently see this in make-up mirrors that have a flat, or "regular" side, and a concave side that magnifies the image one sees in it.

because of your mum

I believe you are talking about the color blindness tests where the numbers are written in colored dots. Basically if you are not color blind you will see the numbers but if you are color blind then you will only see a bunch of dots.

No - the colour blindness gene is only found on the X chromosome.

It's true that monocular vision can be almost as good as the "real thing". There are plenty of visual cues that the brain can use to triangulate space without actually using triangulation. These include the relative speed that things seem to move as you walk or turn, or the variations of shadows on uneven surfaces.

Have you ever gone cross-eyed or tried Magic Eye puzzles? You are actually seeing two images at once, just with slight differences from one another. If you were to put the two images side-by-side, you could judge how near or far an object was by the distance between its left and right images. The result of overlaying the images is a single, distorted "three-dimensional" image, like a sheet of metal that's been dented outward and inward or a fresco with protrusions depicting various figures. Almost the same as a flat drawing, just with better highlights.

rush to the to the doc immediately

They are similar because they both can fool the eye and the ear.

According to an ophthalmologist: "it's not effective and don't be fool by that kind of endorsement".

Usually true, but there are many exceptions-- Water for example turns to ice which has a lower density (gets bigger). Water in fact is most dense at 40C. So from this temperature it gets "bigger" both ways. Rubber gets smaller when heated. This fact give rubber many of it's properties. A squealing fan belt in you car stops squealing when it gets warm because it shrinks.

Amblyopia is also known as lazy eye, it is an eye disorder made by an impaired vision in an eye that otherwise appears normal. It is estimated to affect 1-5% of the population. It occurs when the brain "turns off" the visual processing of one eye to prevent double-vision. Amblyopia usually only affects one eye. When people have amblyopia they have to put an adhesive eye patch on the good eye so the bad eye can "catch up" to the good eye.

The song is by Musiq Soulchild. It's called "Aimewitu. You'll notice he's singing "...'Cause when I'M WITH YOU..." on the chorus. It's on some of the international releases of his first CD, like if you can find the version from Japan or the UK. It was never released in the US. Right now, I just have a copy of it on an old homemade mixed CD I got as a party favor at a banquet. It's a good wedding song, though.

turn the picture upside down. the wife is in between the cane and the leg. the crease in the red clothing is the nose of the farmer's wife and the lines that are in a curve is the hair of the wife. She is in the right side of the bush.

Wait a second here. Back up. You said, "your brain fills in gaps from memory to complete an image." No, it doesn't. Look, even a four-year old can grasp the concept of a dog running behind a fence ( and that's not obvious, by the way). That isn't memory. That's perception.

When we have learned how to perceive things, then magicians amaze us by doing things that we never thought possible!

See: stephansdom, schloss schoenbrunn, Hofburg, Innenstadt, Prater, wienerwald, donaupark, Stadtpark, donauinsel, UNO City, Rathaus, etc

ophthalmoscopy

a Stimulus

Pregnancy can affect the eyes and eyesight. The thickness and curvature of the cornea can be caused by water retention. The changes of blood circulation, metabolism, hormones, and fluid retention are all affects during pregnancy.

Some optical illusions- akin to vandalized to tampered-with traffic signs, could cause vehicular accidents which might take human life.l It would be extremely difficult to prove this as a cause- unless it was a traffic sign that had been painted over no through traffic to ( Through Traffic) or something of the kind. in dim light , even a skilled motorist might be taken in, it can happen.