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Lens.
Lens
The eye spot is so important because it is the only way the eugleniod (euglena) can "see" because it senses light.
pupil
choroid
No. Basically it is a sack filled with a viscous liquid. Not even the lens of the eye is solid; it's another fluid filled sack.
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Sperm is manufactured in the testicles - not the eye !
The Caruncle
Cornia
no
The structure that help to see in eye is retina