If a copy of that prescription is sent to DVLA, they can update the existing licence marker to show that spectacles MUST be worn when driving - the police already check for that when they stop a driver - contact lenses are an acceptable alternative and the driver can show they're wearing them.So you go to Specsavers; they certify that your eyesight is DVLA acceptable when corrected by glasses. They issue you with a prescription and then it is up to the individual to purchase the spectacles and wear them.
Hmmm. Anyone else think there may be a small problem here?
Mel