Human Eye and Camera
The human eye and a camera lens have a few things in common most notably that they both use a converging lens to receive and project images. But human eyes and camera lenses have many things that set them apart from each other.
“Retina Provides Color
• the image an eye perceives is projected from the cornea to the retina, which absorbs the image and projects it to the brain. A camera projects an image on to film where it is captured and saved as a black and white image. The retina contains millions of cones that provide the image with color.
Stereoscopic View
• the biggest difference between eyes and a camera lens is that two eyes give us stereoscopic vision. This allows our eyes to project a more detailed image to the brain than a single camera lens and provide depth of field, something a single camera lens can't do.
Light Sensitivity
• a camera lens projects an image onto film that has chemicals with a uniform sensitivity to light. The eye project images on to the retina that has rods with varying capacities to absorb light.
Light Adjustment
• the human eye controls how much light it receives by reducing and enlarging the size of the pupil. A camera lens has to be adjusted to receive the proper amount of light.
Cameras Have no Blind Spot
• the human eye has a "blind spot" located where the optic nerve leaves your eye and connects to the brain. At that connection point, the eye can't see anything. A camera lens doesn't have a connecting point like this and has no blind spot.
Table: Similarities & the Difference between Camera and Human Eye
Function Camera Human Eye
[pic]
Similarities
Camera
• Opening for light to enter- Aperture • control the amount of light entering camera/eye- Diaphragm control size of aperture • refract light-glass biconvex lens • object of light action to form image-photosensitive chemicals on film • absorb excessive light to prevent multiple images formation-dark internal surface
Human Eye • pupil •
“Retina Provides Color
• the image an eye perceives is projected from the cornea to the retina, which absorbs the image and projects it to the brain. A camera projects an image on to film where it is captured and saved as a black and white image. The retina contains millions of cones that provide the image with color.
Stereoscopic View
• the biggest difference between eyes and a camera lens is that two eyes give us stereoscopic vision. This allows our eyes to project a more detailed image to the brain than a single camera lens and provide depth of field, something a single camera lens can't do.
Light Sensitivity
• a camera lens projects an image onto film that has chemicals with a uniform sensitivity to light. The eye project images on to the retina that has rods with varying capacities to absorb light.
Light Adjustment
• the human eye controls how much light it receives by reducing and enlarging the size of the pupil. A camera lens has to be adjusted to receive the proper amount of light.
Cameras Have no Blind Spot
• the human eye has a "blind spot" located where the optic nerve leaves your eye and connects to the brain. At that connection point, the eye can't see anything. A camera lens doesn't have a connecting point like this and has no blind spot.
Table: Similarities & the Difference between Camera and Human Eye
Function Camera Human Eye
[pic]
Similarities
Camera
• Opening for light to enter- Aperture • control the amount of light entering camera/eye- Diaphragm control size of aperture • refract light-glass biconvex lens • object of light action to form image-photosensitive chemicals on film • absorb excessive light to prevent multiple images formation-dark internal surface
Human Eye • pupil •