Discussion
Match each part of the eye with its function in vision.
List I
A. Cornea and lens
B. Iris
C. Retina
D. Fovea
List II
1. converting light into neural signals
2. focusing light onto the retina
3. the small region of highest acuity and cone density
4. controlling the amount of light admitted
Answer: A
The optics deliver the image and the retina transduces it. Colour discrimination depends almost entirely on the cones concentrated near the fovea. Optics and transduction are separate functions. The fovea carries the burden of colour vision.
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