首页 > 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.

类别 Science

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Created by: SharfuddinR

Number of Blossarys: 11

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La contraportada de l'ull. Retina està directament connectada amb el cervell, els nervis que transmeten els impulsos de tal manera que la Retina és una lleugera expansió sensible del cervell. La ...

Domain: Life Sciences; 分类: Regulatory

Il coperchio posteriore dell'occhio. Retina è direttamente collegato al cervello di nervi che trasmettono gli impulsi in modo tale che la Retina è una luce sensibile espansione del cervello. La cover ...

Domain: Life Sciences; 分类: Regulatory

Задню кришку ока. Сітківки підключено безпосередньо до мозку, нервів, які передавати імпульси таким чином, що сітківці є світло чутливі розширення мозку. Задню кришку або сітківки ока, що складається ...

Domain: Life Sciences; 分类: Regulatory

원뿔 세포의 3 종류의가, 각각 빨강, 녹색, 파랑에 응답 [ RGB ] 빛의 파동 길이. Green-블루 기본 색상입니다. 따라서, 이러한 콘을 통해 모든 색상 볼 수 있습니다. 원뿔 강도 높은 비전을 ...

Domain: Life Sciences; 分类: Regulatory

Cones are of three different types of cells, each responds to Red, Green, Blue [RGB]wave lengths of light. Re-Green-Blue are the primary hues. Thus, through these cones all colors are seen. ...

Domain: Life Sciences; 分类: Regulatory

Rods are one of the two types of receptor cells of retina, responds to intensity of light over the field of view. These cells are sensitive to brightness of light and covers evenly the whole surface ...

Domain: Life Sciences; 分类: Regulatory

眼睛的背面蓋。視網膜與大腦直接相連的神經傳輸一種視網膜是大腦的光敏感擴張的衝動。封底或視網膜的兩種類型的照片受體的儲存格,杆和錐狀細胞組成。因為不同類型的受體,眼睛看到與廣泛不同光照條件下平等基金。看到太有效率是輕或中度的陰影中完成的。人眼可以想像周圍通常在不同的光照條件下的東西。看到在一個房間裡,由 100 燈照亮的物體會有不同的外觀很少如果九十歲的燈關掉。視網膜調整到較低的照明水準。對人的眼睛 ...

Domain: Life Sciences; 分类: Regulatory

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