The RAF has more applicants who reach the standards required in all respects than vacancies. Your loyalty and enthusiasm is commendable (although not unique - in fact normal amongst armed forces applicants) but if you do not reach the medical requirements you won't get in. I know it sucks but that's how it is. Eyesight is a pretty important attribute for a pilot.
If your desire is to 'fight for your country' look at non-flying options in the services. If you just want to fly, see if you can get a CAA Class 1 medical and if you can, go civvy. Your choice.
Very noble of you to say you 'don't mind flying VC-10s or Hercs'. Many people would sell a testicle for the privilege or flying any military hardware.
And, RTF sticky thread at the top of the page.