Thread
:
Zenny update, Feb 27, 2012
View Single Post
#
6
Posted to rec.crafts.metalworking
Lloyd E. Sponenburgh[_3_]
external usenet poster
Posts: 4,632
Zenny update, Feb 27, 2012
rangerssuck fired this volley in news:65903f43-
:
WHAT?!? Sharpest and highest contrast are what define the word
"focus". Why in the world would you want anything less than the
sharpest focus? How could that make your eye muscles work harder?
I did not use the word "focus". I used the term "the correction is too
strong".
When over-correction is introduced, the image _appears_ to the patient to
be sharper because it also becomes smaller and more contrasty. EXACTLY
on focus is just before that visual artifact occurs.
Many people choose the over-corrected prescription, only to find later
that their eyes are constantly fatigued.
LLoyd
Reply With Quote
Lloyd E. Sponenburgh[_3_]
View Public Profile
Find all posts by Lloyd E. Sponenburgh[_3_]