Home > Blossary: Vision
Vision , visualizing or seeing is an act of eye and brain together. Human being visualize an object in two processes, Vision & Mental. Vision process is done by eye consisting of three abilities of eye ; Acuity , Accommodation & Adaptation. Acuity is the ability of eye to measure accuracy of vision. Acuity lets eye to see detail regulating or controlling lights. The more the light is the better the acuity or vision is. Accommodation is the outcome of muscular functioning of Lens & Iris together to able eye to focus on an object. While, with the ability of Adaption eye adjust itself to different lighting levels. The eye functions over a wide range of light levels and could cope with differences of brightness. Although very high brightness levels may cause blindness due to glare, there will be loss of detail at low light levels. An adjustment from low to high brightness is completed in seconds, but reverse takes minutes. At very high brightness levels there may be some blindness due to glare, and there may be some loss of details at low levels. Eye tends to adjust to the area of highest brightness within the field of view. When a person first enters in to a dark room his or her vision will be poor because of the CONES can't see, but with the RODS taking over the vision will be clearer. Brain does the mental process of visualisation. Brain is the essential part of vision. We can't see anything without brain. Brain, indeed process the data and information fed by eye to let us see or visualise eventually. The region of brain responsible for sight has the area corresponding to the FOVEA and a much smaller area devoted to the PERIPHERY. The images on the RETINA are inverted and transferred left to right and the correction made by the brain. Now, if the brain is upset in any way it makes incorrect interpretations of the data received. Most of the phenomena modify color takes place in brain not in the eye. The way in which we see a surface is largely depend of the intensity and wavelengths of the light it reflects, although nature of the light source may change the appearance of color. We don't have to look at a light source to idea on a an environment, bright or dim, we could idea on same by the appearance of the objects within the field of view. The brain records a image or scene almost simultaneously with actual sighting, but when two lights are flashed together, the one seen by FOVEA appear to flash ahead of what seen by PERIPHERY. The brain is slower in picking up Blue light since eye finds it difficult to focus [ Accommodation ability of eye . Blue lights used in police cars require a lower flashing rate than other colors to let them see clearly.

Kategória: Science

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Created by: SharfuddinR

Number of Blossarys: 11

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视网膜的外边界。该地区不能解决具体细节,但可以拿起微弱的图像,以及响应变化的亮度和议案。周边视力大多基于杆和夜间很有效。

Domain: Life Sciences; Kategória: Regulatory

網膜の外側の境界。地域細かいディテールを解決はできません、かすかなイメージをピックアップし、明るさと運動の変化によく対応することができます。周辺視野は棒に大抵基づいて、夜に効果的です。 ...

Domain: Life Sciences; Kategória: Regulatory

The outer boundaries of Retina. The area cannot resolve the fine detail, but can pick up faint images and respond well to changes of brightness and the motion. Peripheral vision is mostly based upon ...

Domain: Life Sciences; Kategória: Regulatory

Fovea, the most central part of Retina has the largest concentration of cells. Each cell is believed to be connected directly to the brain through own nerves. Foveal vision is based upon Cones and ...

Domain: Life Sciences; Kategória: Regulatory

錐体細胞の 3 つの異なる種類は、それぞれ赤、緑、青に対応 [ RGB ] 光の波の長さです。再 Green 青は主要な色合いです。したがって、これらの錐体を介してすべての色は見られています。コーン高強度ビジョンを生成します。 ...

Domain: Life Sciences; Kategória: Regulatory

Die weiblichen Zapfen sind drei verschiedene Arten von Zellen, jeder reagiert auf rot, grün, blau [ RGB ] Wellenlängen des Lichts. Re-grün-blau sind die primären Farbtöne. So werden durch ...

Domain: Life Sciences; Kategória: Regulatory

Kegler er tre forskellige typer af celler, hver reagerer på rød, grøn, blå [ RGB ] bølgelængder af lys. Green-blå er de primære nuancer. Således er alle farver ses gennem disse kegler. Kegler ...

Domain: Life Sciences; Kategória: Regulatory

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