Give them a call and ask the question... There have recently been changes in the Medical Staff at the CAA so they should be able to answer you directly.
Having said this I do recall that (and someone will probably be along to correct me shortly if I have it wrong).... I do recall that the "process" for medical related questions had changed somewhat and in the first instance your AME should be the first point of contact.
I suspect if you are out of limits they may be able to consider you for a restricted medical.. possible an OML.. but don't quote me on this.
I had a turbulent time regarding vision.
You could also always book in for a "Opthalmological Assessment" without taking the initial examination at LGW and they Eye Doc should be able to give you an answer.
Good Luck.
Scoobster