Hi
The information on Free NHS eye test is available here - https://www.nhs.uk/nhs-services/opticians/free-nhs-eye-tests-and-optical-vouchers/
By medical exemption I am guessing you mean https://www.nhsbsa.nhs.uk/exemption-certificates/medical-exemption-certificates and if so that says
My understanding therefore is there is nothing that would automatically link the two.
<<hugs>>
Steve
