I would like to propose official lenses protectors for people with glasses. As some people already reported, scratches can still occur with some vision glasses even with the spacer given with the Quest.
There are some 3D printable lenses protectors online but from what I saw they do not always fit.
Please make official ones that they would be available to purchase in your store as an extra accessory.
The accessory could be a couple of attachable "rings" around the lense that will not let glasses touch the lenses it the device.