The Circle and Sphere - Why so prevelant in the Universe?

[Chaos' lil bro Order]

I Learned something recently from my Optician. The vitreous humour serves no anatomical purpose once the eye is formed. It could be drained completely and replaced with saline with no untoward effects.

Yes, but its vital in creating part of the turgor pressure needed to inflate the eyeball, so saying that replacing it with saline solution means that the saline would then provide the turgor pressure. That is certainly an anatomical purpose, unless you want your lens resting on your retina and you enjoy blindness.


@Mapes

Certainly the ball and socket physicality is important and efficient when one's shifts one's gaze upwards or sideways. But the primary reason the eye is spherical has to do with how light is refracted in the lens. We know the lens is not spherical but rather a flattened sphere not dissimilar to the geometry of a magnifying glass. Clearly there must must be space between the lens and retina for the refracted light to converge onto a point on the retina, so a spherical eyeball makes sense.