How to convert a BiFocal prescription to Single Vision (Near Vision only)?

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Touch Tone Tommy - 21 Dec 2004 04:26 GMT

I'd like to order a pair of single vision glasses with only the near
vision in them. Here's my current prescription:

Sphere Cylinder Axis Add Prism PD
O.D. -2.00 -4.25 097 1.25 Dist 63
O.S. -2.00 -3.50 080 1.25 Near 60

What do I need to order?

Thanks in advance.

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RM - 21 Dec 2004 04:45 GMT

Readers:

OD: -0.75 - 4.25 X 97
OS: -0.75 - 3.50 X 80

This assumes your working distance for the reading glasses is the same as
the reading distance your eye doctor used when he wrote the prescription.
It probably is.

--------

> I'd like to order a pair of single vision glasses with only the near
> vision in them. Here's my current prescription:
[quoted text clipped - 6 lines]
>
> Thanks in advance.

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Mike Tyner - 21 Dec 2004 04:53 GMT

Most opticians will do this for you, if you send them the bifocal
prescription and tell them you want "reading glasses" made from it.

But the calculation is simple - just sum together the Sphere and the Add to
get -0.75. All else remains the same.

-MT

> I'd like to order a pair of single vision glasses with only the near
> vision in them. Here's my current prescription:
[quoted text clipped - 6 lines]
>
> Thanks in advance.

Reply to this Message

Mike Tyner - 21 Dec 2004 05:07 GMT

> But the calculation is simple - just sum together the Sphere and the Add
> to get -0.75. All else remains the same.

Oops.. not exactly "all else". Don't confuse them by including the Add or
the far PD.

-MT

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Touch Tone Tommy - 21 Dec 2004 07:48 GMT

>> But the calculation is simple - just sum together the Sphere and the Add
>> to get -0.75. All else remains the same.
[quoted text clipped - 3 lines]
>
>-MT

Got it! Thanks, guys, for the help!!

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