Amongst the handouts at the recruiting office, I was given this one
Outline Guidance on Medical Standards required for Officer Entry into the RN, RM & QARNNS
For aircrew, standard 1 visual acuity is required along with colour perception 1.
Standard 1 is:
to be achieved with correcting lenses:
Right eye 6/6 N5
E 1
E 1
Left eye 6/6 N5
to be achieved without correcting lenses:
Right eye 6/12 N5
E3
E3
Left eye 6/12 N5
Refraction limit
Right Eye
Total
Hypermetropia +3.00 sphere
Astigmatism +1.25 cyl
Myopia (in any meridian) -0.75 sphere or cyl
Left Eye
Total
Hypermetropia +3.00 sphere
Astigmatism +1.25 cyl
Myopia (in any meridian) -0.75 sphere or cyl
To be honest, a lot of it doesnt make sense to me (N5? E1?) but your local optician will understand it.
Just for the sake of completeness, here is the colour perception standard as well:
Colour Perception Standard 1 : The correct recognition of coloured lights shown through the small apertures on the Martin Lantern at 6 metres distance.
Hope this helps Geezer, as I had the info to instantly to hand, I thought i'd spare Melrin Dip the "pleasure" of typing it all out!