ZO'd Moosw writes:
<<<And sometimes with a less than perfect lens, or perhaps no lens at all. The
one I posted in this thread was taken using a zone plate.
Interesting--which one do you have? Renditions often seem similar to pin holes
but much more light available. Actually diffractive optics can be quite sharp
and are used in
some intraocular lens (IOL) design to provide multiple (usually 3) focal
lengths after cataract extraction. Problem is only about a third of the light
if have 3 FL's is available diminishing low light performance and halos are
prominent at night. Any retinal pathology would preclude their use as well.
True accommodating IOL's have been developed (Juvene, Atia vision etc.) but are
at least 4-5 years away given FDA requirements. They will make any current IOL
look hopelessly primitive though.
Zoned In, Mike
--
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