Multifocal Contacts: RGP Vs. Soft...?

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toddster63 - 16 Apr 2008 17:04 GMT

I have tried soft multifocals (ProClear and Purevision), and didn't
care for the compromise in vision--the simultaneous vision worked
okay, but it was definitely a compromise. I think one of the problems
may have been too that neither of these multifocals corrected for my
astigmatism (I have around 1 diopter correction for both sphere and
cylinder per eye).

I am wondering if RGP multifocals (particularly the new Synergeyes
with dual near center) would be any better? Particularly if they have
cylinder correction for my astigmatism...?

It seems to me that simultaneous vision is going to be simultaneous
vision to the brain, regardless of the material of the lenses, but you
hear how much better GP designs and materials are at multifocals...?

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Jan - 16 Apr 2008 20:23 GMT

toddster63 schreef:

> I have tried soft multifocals (ProClear and Purevision), and didn't
> care for the compromise in vision--the simultaneous vision worked
> okay, but it was definitely a compromise. I think one of the problems
> may have been too that neither of these multifocals corrected for my
> astigmatism (I have around 1 diopter correction for both sphere and
> cylinder per eye).

Ask for the Proclear Multifocal with astigmatism correction.
Never the less, still a compromise and still a simultaneously working
system.

> I am wondering if RGP multifocals (particularly the new Synergeyes
> with dual near center) would be any better? Particularly if they have
> cylinder correction for my astigmatism...?

Most RGP lenses are correcting a small amount off astigmatism, it
depends on the relation between the amount of astigmatism due to
differences in curvature in two directions of the cornea and the amount
of astigmatism in refraction error.

BTW, not all bi/multi focal RGP's are designed as simultaneous viewing
lenses.
Ask your professional.

> It seems to me that simultaneous vision is going to be simultaneous
> vision to the brain, regardless of the material of the lenses, but you
> hear how much better GP designs and materials are at multifocals...?

There are other designs instead of the simultaneously, troubling the
brains less sometimes.

Hope this helps,

Jan (normally Dutch spoken)

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Don W - 17 Apr 2008 04:59 GMT

Jan or anyone,

Can you steer me to where the optics of these lenses (equations) are
described?
Thanks.

Don W.

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Jan - 18 Apr 2008 21:15 GMT

Don W schreef:

> Jan or anyone,
>
> Can you steer me to where the optics of these lenses (equations) are
> described?

http://www.coopervision.com/us/patient_aboutus_news.asp?id=41

Jan (normally Dutch spoken)

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