@REECE
I am not entirely sure, but when I went in for my YOU Session and enquired about my eyesight, the nurse handed a sheet to me which I was initially asked to take to a eye clinic and have the doctor fill out after a test [And then later asked not to bother with it as I would have to do the medicals on assessment day anyway].
It specifies that an unaided 6/12 vision is acceptable, however you never know.
I havnt completed my specialist testing yet, which is on the 25th of this month. Ill update once I am informed of my situation after my medicals. My eyesight is on the border at 6/12 and can go either way.