What's the difference between single vision and multifocal prescriptions?

Single vision prescriptions (SVP) have one prescription strength throughout each lens. They can be made for general, intermediate, or reading distance use.

Multifocal prescriptions have multiple strengths in each lens. These are typically made as lined bifocals or as no-line progressives, with general-distance at the top of the lens and near-distance at the bottom.

Whatever your prescription type is, we'd be happy to make you a custom pair of TheraSpecs!

For any prescription, we'll need your pupillary distance and a current copy of your prescription.

For multifocal prescriptions, we'll need another measurement called segment height: the number that marks where your prescription strength changes.