Kalman Rubinson wrote:
>> On 16 May 2001 00:26:49 +0100, rhall at webmail.uvi.edu ("Richard L.
> Hall") wrote:
>> >How many vertebrates lack eye lenses? Fish have them as do all
> >tetrapods that I know of. So maybe the answer is zero. There are
> >some species that have greatly reduced eyes and presumably greatly
> >reduced optic tracts. Still, so many other central systems
> >decussate, that it seems unlikely that something like the formation
> >of a lens could account for crossed visual pathways.
>> Yes. Even a pin-hole lens produces image inversion.
[Hammond]
There is no sensible reason to believe that the
compound eye of a fly produces an inverted image.
and flys do not have a desussated CNS to my knowledge.
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George Hammond, M.S. Physics
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