Opticians can refer to the DVLA (via the police I believe)….the police are exempt from having to gain consent to notify the DVLA directly…i know because the police did it to me based on a non driving issue but incorrect info my useless employer supplied to them when they thought I’d gone AWOL at work.
Basically if the police feel it’s in the public interest, a safeguarding issue or a safety for other road users issue then they can approach the DVLA without you knowing about it until you get the letter threatening to revoke your licence….and then they will collude to avoid telling you who initially supplied them the info they’re acting on…i had to lodge a complaint with the IPCC in order to get them to divulge that my employer had duff information on my medical history….all fun and games until you realise your job, your independence, your social life and your relationship are under threat because of losing your licence….managed to get my GP to back me up and head off the police and DVLA but my employer is still being a dick about the nonsense on the ‘medical’ file they hold on me….never mind, I now have a solicitor and I’m in the process of suing them, it’s not like the NHS needs the money is it!?…you think they’d just admit their mistake and apologise instead of paying out but no, in true public sector fashion they’re digging in and will end up handing over a lot of money to me instead….the police effectively threw them under the bus….can’t wait.