It depends on the model of the smart glasses you have purchased.
Google Glass v1
This model of glasses is delivered with frames equipped with non-prescription lenses and mounting instructions.
Consult your optician who can prescribe lenses adapted to your vision.
Realwear HMT1 & HMT1-Z1
Fujitsu HMD IOT001
If you wear corrective glasses to use a computer, or protective glasses for your work, continue to wear the same glasses when using these models.
Even if these glasses are designed to work properly with or without corrective or protective glasses, we recommend that you wear protective glasses when using them.
Some models can be equipped with headband to simplify the use and comfort of your corrective and connected glasses.
For this model, the manufacturer has not provided a frame dedicated to the wearers of corrective glasses. You can superimpose your two pairs of glasses.
This bezel includes a frame with a protective lens.
Eye protection marking
For each of the above models, we leave it to you to evaluate the quality of protection to match your PPE criteria.
Some standards can help you in the classification of eye marking EN66, EN169, EN170, EN171, EN172,...
The manufacturer's documentation including information and certificates for each model of glasse are available here.