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 Posted: Mon Jan 29, 2007 9:29 pm
I don't think your helping at the moment Cammie
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Posted: Mon Jan 29, 2007 9:30 pm
Is it really true Rianna? crying
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Posted: Mon Jan 29, 2007 9:30 pm
hey cammie, do you still have the notes on rods and cones from last year?
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Posted: Mon Jan 29, 2007 9:31 pm
Lemmeee Check....
No.
Deletation.
stare
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Posted: Mon Jan 29, 2007 9:32 pm
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Posted: Mon Jan 29, 2007 9:32 pm
The Next Sentence is a lie....... .....The Previous Sentence is True rolleyes
Thats because you were stupid and deleted all of
Your Brade 8 stuffs  Music Makes the World go Round!
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Posted: Mon Jan 29, 2007 9:33 pm
candee-addict
hey cammie, do you still have the notes on rods and cones from last year?
Why? Do you agree the theory that we all see completely differently?
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Posted: Mon Jan 29, 2007 9:34 pm
Aoi the crossdresser Is it really true Rianna? crying i don't think so because teal to me is the shade you provided in font saying that it was teal and turquoise is whats more blue then green which is where most girls get mixed up with those colours.
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Posted: Mon Jan 29, 2007 9:35 pm
Rianna Azul Aoi the crossdresser Is it really true Rianna? crying i don't think so because teal to me is the shade you provided in font saying that it was teal and turquoise is whats more blue then green which is where most girls get mixed up with those colours. Do you agree that teal is a mixture of green and blue?
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Posted: Mon Jan 29, 2007 9:35 pm
The retina contains two types of photoreceptors, rods and cones. The rods are more numerous, some 120 million, and are more sensitive than the cones. However, they are not sensitive to color. The 6 to 7 million cones provide the eye's color sensitivity and they are much more concentrated in the central yellow spot known as the macula. In the center of that region is the " fovea centralis ", a 0.3 mm diameter rod-free area with very thin, densely packed cones.
The experimental evidence suggests that among the cones there are three different types of color reception. Response curves for the three types of cones have been determined. Since the perception of color depends on the firing of these three types of nerve cells, it follows that visible color can be mapped in terms of three numbers called tristimulus values. Color perception has been successfully modeled in terms of tristimulus values and mapped on the CIE chromaticity diagram.
Cones are concentrated in the fovea centralis. Rods are absent there but dense elsewhere.
Measured density curves for the rods and cones on the retina show an enormous density of cones in the fovea centralis. To them is attributed both color vision and the highest visual acuity. Visual examination of small detail involves focusing light from that detail onto the fovea centralis. On the other hand, the rods are absent from the fovea. At a few degrees away from it their density rises to a high value and spreads over a large area of the retina. These rods are responsible for night vision, our most sensitive motion detection, and our peripheral vision.
Current understanding is that the 6 to 7 million cones can be divided into "red" cones (64%), "green" cones (32%), and "blue" cones (2%) based on measured response curves. They provide the eye's color sensitivity. The green and red cones are concentrated in the fovea centralis . The "blue" cones have the highest sensitivity and are mostly found outside the fovea, leading to some distinctions in the eye's blue perception.
The cones are less sensitive to light than the rods, as shown a typical day-night comparison. The daylight vision (cone vision) adapts much more rapidly to changing light levels, adjusting to a change like coming indoors out of sunlight in a few seconds. Like all neurons, the cones fire to produce an electrical impulse on the nerve fiber and then must reset to fire again. The light adaption is thought to occur by adjusting this reset time.
The cones are responsible for all high resolution vision. The eye moves continually to keep the light from the object of interest falling on the fovea centralis where the bulk of the cones reside.
The rods are more numerous of the photoreceptors, some 120 million, and are the more sensitive than the cones. However, they are not sensitive to color. They are responsible for our dark-adapted, or scotopic, vision. The rods are incredibly efficient photoreceptors. More than one thousand times as sensitive as the cones, they can reportedly be triggered by individual photons under optimal conditions. The optimum dark-adapted vision is obtained only after a considerable period of darkness, say 30 minutes or longer, because the rod adaption process is much slower than that of the cones.
The rod sensitivity is shifted toward shorter wavelengths compared to daylight vision, accounting for the growing apparent brightness of green leaves in twilight.
While the visual acuity or visual resolution is much better with the cones, the rods are better motion sensors. Since the rods predominate in the peripheral vision, that peripheral vision is more light sensitive, enabling you to see dimmer objects in your peripheral vision. If you see a dim star in your peripheral vision, it may disappear when you look at it directly since you are then moving the image onto the cone-rich fovea region which is less light sensitive. You can detect motion better with your peripheral vision, since it is primarily rod vision.
The rods employ a sensitive photopigment called rhodopsin.
Images are formed in a camera by refraction in a manner similar to image formation in the eye. However, accommodation to image closer objects is done differently in the eye and camera.
Knock yourself out.
I just copied and pasted.
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Posted: Mon Jan 29, 2007 9:36 pm
Aoi the crossdresser candee-addict
hey cammie, do you still have the notes on rods and cones from last year?
Why? Do you agree the theory that we all see completely differently?
yes
i'm sorry Aoi, but it has been scientifically proven
it's the same reason some people need glasses
usually it's very slight, but sometimes (colorblind people) it is more dramatic
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Posted: Mon Jan 29, 2007 9:37 pm
Aoi the crossdresser Rianna Azul Aoi the crossdresser Is it really true Rianna? crying i don't think so because teal to me is the shade you provided in font saying that it was teal and turquoise is whats more blue then green which is where most girls get mixed up with those colours. Do you agree that teal is a mixture of green and blue? yep because i can see both colours in teal it is not one or the other but both mixed together Have you stopped spazzing yet ? it scares me
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Posted: Mon Jan 29, 2007 9:38 pm
candee-addict Aoi the crossdresser candee-addict
hey cammie, do you still have the notes on rods and cones from last year?
Why? Do you agree the theory that we all see completely differently?
yes
i'm sorry Aoi, but it has been scientifically proven
it's the same reason some people need glasses
usually it's very slight, but sometimes (colorblind people) it is more dramatic
What do you mean it's very slight?
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Posted: Mon Jan 29, 2007 9:39 pm
Aoi the crossdresser candee-addict Aoi the crossdresser candee-addict
hey cammie, do you still have the notes on rods and cones from last year?
Why? Do you agree the theory that we all see completely differently?
yes
i'm sorry Aoi, but it has been scientifically proven
it's the same reason some people need glasses
usually it's very slight, but sometimes (colorblind people) it is more dramatic
What do you mean it's very slight?
people see the colors differently, but there is so little difference that you can barely tell
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Posted: Mon Jan 29, 2007 9:40 pm
crazy person your not helping with the situation either
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