I sometimes clean my 2 pairs of coated specs, and  removable teeth parts
(with just a drop of detergent added).
Doesn't damage them.
Doesn't particularly clean anything either, even with 2 passes.
Maybe it does shake a bit of the grit out of the corners and hinges, but
there is no sign of any stuff in the container.

I've seen coated lenses that were damaged from the use of ultrasonic cleaners,
probably from using harsh surfactants and too long of a run cycle.

The anti-reflection coating companies recommend soap and water, and if you do
this on a daily basis there should not be any significant build up of oils and
dirt around the lens and in the bridge area.

Hope this helps,

Robert Martellaro
~~~~~~~~~~~~~~~~~~
Optician/Owner
Roberts Optical
~~~~~~~~~~~~~~~~~~
"If a million people believe a foolish thing, it is still a foolish thing."
-  Anatole France

On 8/22/06 10:34 PM, in article
1156311277.801922.299350@m79g2000cwm.googlegroups.com,

It should not be a problem for good coatings made under clean conditions.
Unfortunately, it is difficult to get coatings I like. I like glass lenses
with hot deposited magnesium fluoride coatings. When done well, such
coatings are difficult to remove by means other than what would damage the
underlying glass. That is, using strong mineral acid or grinding is required
to remove the coating.

With plastic lenses that cannot be heated up to deposit hard magnesium
fluoride coatings, much softer and less durable coatings are the norm.

Bill
-- Ferme le Bush