Prescription for Glasses from Contact Prescription?
August 28th, 2010 | See the Top Answers to this Question Below
Is there any way to tell what my prescription (for glasses) is based my contact lens prescription?
My contact prescription says something like:
BC 8.6
DIA 14.2
PWR -4.75
And for glasses, I need to know:
Sphere (SPH), Cylinder (CYL), Axis, PD (Pupil Distance), Mono R, Mono L, and Near PD?
I already have glasses, but I have no idea what the prescription for them is.
Any help would be greatly appreciated. Thank you!
More Contact Lens Websites:
- Sphere Xp, The Eleven DI amensions of Space/TI ame – Part I | Sphere Reviews & Toolbox
- How to read eye prescription?
- How to measure your pupillary distance – Youth Junction
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The power number is probably the same as the sphere. Apparently, you were not prescribed toric contacts by the data you give, so there is no way to know what cylinder and axis you were prescribed, if any. Not all eyeglass prescriptions specify cylinder and axis.
The PD is measured by sitting in a chair at the optician’s office to make sure you are picking out frames that are compatible with your eyes. Mono Right and Left refer to the distance between your nose and the center of whichever eye. Mono R + Mono L = PD. Near PD, I assume, is only used when prescribing bifocals. Theoretically, you could measure these yourself, since these values are in millimeters. Average PD is about 62mm and most people fall within the 54 to 74 range.
If you want to get new glasses, just take your old ones with you, and they can copy them. They have a device called a lensometer to calculate the prescription from them.
Legally, a spectacle prescription is good for 2 years. So if it has been longer than that, then you should get a new eye exam.
No, there is no way to give you the prescription for your glasses just by going off your contact lense prescription. The reason for this is that the contact lense is placed on your eye, as to glasses which sit on your face. The only way to be absolute sure is to get your eyes tested at the optometrist. They might even have your prescription on record from the last time you got your eyes checked.
Good luck!