Help. I've been dispensing for 6 years and not one person has asked me for reading glasses to wear over contacts. Until today. Do I keep the astigmatism correction in the reading glasses?
Rx:
-3.75 -0.50 X 180
-3.50 -0.50 X 175
ADD 1.75
C/L scrip is sphere.
Is -2.00 -0.50 X 180 correct for right eye or just -2.00?
Wait...meant to write +1.75 -0.50 X 180 for right eye or +1.75 sphere.
It's late.
Last edited by obie; 10-13-2015 at 08:02 PM. Reason: crap
How about you try giving us the Rx when it's not so late for you. You've got -3.75, -3.50, -2.00, +1.75 and a 1.75 ADD. We'll be more than happy to help you out.Originally Posted by obie
I didn't attend the funeral, but I sent a nice letter saying I approved of it. Mark Twain
Thanks. It's still late but here goes.
spec Rx:
-3.75 -0.50 X 180
-3.50 -0.50 X 175
ADD 1.75
C/L scrip is sphere.
I'm trying to decide if to order these reading glasses for use over contacts w or w/o cyl. Patient wears -3.75 sph in right eye and -3.50 sph in left.
Would appreciate help. This situation hasn't come up for me yet. I'm thinking the astigmatic correction would help the man to see better for reading over contacts but not really sure. The C/L is supposed to mask the astigmatism, but I know it can compromise vision to some extent.
Ideally, a over-refraction would be the ultimate way to confirm that the cylinder is needed.
The "masking" effect can fluctuate, based on the lens ability to remain stable in shape, between blinks. The age of the lens would also influence this. You could confirm this with a over-K measurement.
Eyes wide open
Look, don't over think it. If they are wearing C/L's the tear layer in between the corneal surface and the C/L is going to mask any need for a Toric design, right. So with that said,why would you want to use cyl. You essentially answered your own question. If you have the ability, trial frame +1.75 over the C/L's. Also, this might be a good time to talk with your patient about wearing a regressive lens design in lieu of a SV reader, they've already lost some of their depth perception from about 12 feet and in. The regressive design will give it back to them.
I didn't attend the funeral, but I sent a nice letter saying I approved of it. Mark Twain
Some good posts, here ^^^.
1. Spherial SCLs don't "mask astigmatism". That was never true.
2. Normally the astigmatism in the over-correction would be helpful. With a small amount like that, though, it will be "meh".
3. The best way to do it, indeed, is an over-refraction, but that's just too much work.
4. I suggest you just use a 1/4 D and split the difference between doing something and doing nothing.
Explain to them the stronger the power on the glasses the greater the magnification and nearer the focus will be. "So the eye of a needle will be harder to see with a weaker power but have more range than a stronger power".
Then send them to the drug store and try out some powers starting with +1.75 keeping in mind what was just said.
Generally, if the contacts are providing good distance vision, than the spherical add power alone would suffice for all purpose readers.
I'm with Paul Smith here. I would encourage looking/talking about some form of regressive lenses depending on lifestyle. Getting to be enough add power to not give much range. No cyl in the reading only lenses, just sph rx of 175.
Also I've found that putting cyl in readers over contacts causes some people headaches due to the on and off nature of readers.
Thanks for taking the time. Patient went with aspheric +1.75 OU. From past experience, whatever I order had better be perfect or it's coming back so your inputs were really helpful.
Perfect is "good enough".
Science is a way of trying not to fool yourself. - Richard P. Feynman
Experience is the hardest teacher. She gives the test before the lesson.
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