Question

what are the differences between aposition and superposition vision?
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Answer 1

All insects have a pair of compound eyes. There are two types of compound eyes: apposition and superposition eyes. Apposition eyes are by far the most common form of eyes in diurnal living insects, including bees, while superposition eyes are more common in nocturnal insects2,3.

Answer 2

Answer:

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Explanation:

Apposition and superposition compound eyes. The eyes of most day-active insects (like bees) are apposition compound eyes (a)-the photoreceptors (hatched) of each ommatidium (nine ommatidia are seen here in longitudinal section) receive light exclusively from the single facet lens of their own ommatidium (because each ommatidium is sleeved by a layer of light-absorbing pigment granules that prevent light arriving from neighbouring ommatidia). Most nocturnal insects (such as moths and beetles) possess refracting superposition eyes (b) in which the lenses and photoreceptors are separated by a wide optically clear (i.e. pigment-free) region known as the clear zone (cz). Owing to powerful radial gradients of refractive index, the lenses allow light from many hundreds of facet lenses to be focused onto single photoreceptors in the retina, thus dramatically increasing light capture. Interestingly, some nocturnal bees, ants and wasps have retained the apposition eyes of their day-active ancestors, but see remarkably well nonetheless

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