What is the eye component responsible for vision in low levels of illumination or at night?
Refer to figure.
HUMAN EYE - INNER LAYER
The retina is a light-sensitive layer inside the eyeball where the photoreceptors are found. Images are focused on the retina where the photoreceptors convert them into nerve impulses that are then transferred the brain. The retina has two types of photoreceptors:
1. Rods: They are found in the periphery of retina and they enable scotopic (low-light) vision. The rods can only create black and white images and are also responsible for peripheral vision.
2. Cones: The fovea, at the retina's center, contains only cones that enable photopic (bright-light) vision. The cones are responsible for direct vision and require bright light to function. They are used to detect colours.
Rods → Night vision, Peripheral vision (black and white images)
Cones → Day vision, Central vision (colourful images)
Fovea → Area where cones are located.
Crystalline lens → Eye component that changes shape in order to vary the focal length of the vision.
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