Toric Contact Lenses prescription?

Question

I'm planning to get the Purevision Toric contact lenses. here is my prescription:

O.D. -5.00 -1.00 063
O.S. -3.50 -0.75 140

I have some questions because I am planning to buy online. There is no option for -1.00 cyclinder. What should i put? What about the 063 axis? Should i put 60?

Do the sphere's change or anything? Should i enter slightly below?

Thanks!

Answer 1

If your guessing, then I'd imagine you doctor hasn't prescribed you contact lenses yet. It is a required in a majority of the states in america that the doctor prescribe them, otherwise your can't buy they. The company your using WILL contact your doctor if an accurate CL Rx isn't presented.

So your obvious first step is to see your doctor so that an EXACT Rx can be written for you.

Answer 2

As Henry L pointed out you should probably get a CL Rx and have a trial pair of lenses given to you to make sure that they will work for you. Spectacle Rxs and CL Rx ARE different especially when a person has astigmatism.

Having said that, I will tell you this much, if a certain CYL is unavailable in you Rx, which in your case is -1.00 then you take -0.25 from the CYL in your Rx (or whatever steps the CYL is available in) and add it to the sphere in your Rx (in your case -5.00).

I believe that PV Torics are available in the -.75 cyl so your Rx for the right eye will be -5.25 -0.75 x060.

Again, having a trial pair of lenses is ideal for astigmatics. Don't waste your money on a supply of lenses that you may not be able to see in well.

GOOD LUCK :)

Answer 3

You need a formal contact lens Rx.

Yes, with your Rx, there would normally be a "vertex distance" adjustment in the right eye sphere, and possibly the left, but in addition the contact lens astigmatic axis can differ by 10, even 20, degrees from the spectacle one.

The contact lens Rx *assumes* the horizontal axis of the lens sits horizontally on the eye. Often it doesn't, but adopts a constant "offset" due to the shape of the cornea and the influence of the eyelids.
(and different brands with the same Rx can sit differently)

This will be measured and allowed for in a specific contact lens Rx.

Answer 4

Your doctor could have possible wrote out the wrong cylinder. Is that the brand of contacts that were prescribed for you?? If not, don't switch brands without speaking with your doctor.

Answer 5

For all details, information and remedies about contacts check out http://use-contactlens.blogspot.com/