Re: Calculating Add for computer work

"Mike" <turnpike_user@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:8CVVbpRVLimHFwRy@xxxxxxxxxxxxxxxx
I made it clear to my optometrist that I would probably get less strain if
I wore glasses for computer work. So he gave me what now turns out to be a
reading prescription. It didn't dawn on me at the time when he said "hold
this book in front of you while I put this in front of your lens", that
they would be no good for computer work (unless I get much closer to the
screen)

My Add is +1.00 so is there a rule for working this out for computer work
with a screen that's about 70cm away?
--
Mike News

For some computer lenses like the Zeiss Gradal RD, you just give them your
regular progressive Rx, and they automatically adjust it for computer use.
This is typically done by adding +.5 to your distance vision and subtracting
..5 from the add power (so that the reading power is actually the same as it
would have been with regular progressives). This makes your distance power
about the right power for computer distance (you don't get a true distance
power and you cannot drive a car with these lenses).

The .5 is just an example (don't recall what Zeiss uses), and sometimes you
can choose between different adjustments (such as .5 and .75 ). See an
optician for details.


.

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