Hi group,
When you read something on a computer screen or printed material with
certain high contrasting colors (ex. black background/white lettering
or blue background/yellow lettering) and then close your eyes or look

Due to the fact that i can't find goggles that fit my wide and deep face
anywhere, I began lately to swim without goggles at all.
It actualy feels great, but my concern is that i might cause damage to
the eye tissue by exposing it to fraction with water or to infacted water.

Which way round does BC work?
If two lenses are both DIA 14, one is BC 8.4 and one BC 8.6 - which will be
the tigher fitting lens?

I am a licensed optician but got out of the ophthalmic business about 25
years ago. At that time I did eyeglass surfacing, fabrication, fitting
and some teaching. I did not fit contacts but did take a couple of
courses. I am currently an optical engineer so not completely out of

Just got my last 3 prescriptions and notice a changing degree of
astigmatism? Is this normal? or a error/difference between methods of
testing?
March 02    Left    -5.50 Cyl -0.5 Axis 0.2    Right    -5.50 Cyl   -1.00

Does anyone know anything about corneal haze following PRK surgery? Can
aggressive haze formation actually be related to inducing an astigmatism?
Can corneal haze cause slight image ghosting in each eye? (monocular
diplopia)

Any eye, human or primate will tend to adapt to whatever lens is
placed before it.It does not necessarily develop a refractive error.
When the lens is removed the vision of the animal will soon return to
normal.