Sorry, im out at the moment, so still on the phone answering this, Ill try answer fully when I get home...However, I thought id chuck this in first. Have you ever been tested for colourblindness? The reason I say so is because of two things...you cant judge depth with dark lenses....some coloured lenses cure this. Certain tints, as in red/purple in particular, in certain people with colour blindness, can alter the way your brain interprets colours, and effectively depth (like 3D glasses), and in a way, correct the colourblindness. Obviously this is completely dependant on the person, and the type of colour blindness one suffers from.
My advice first and foremost above anything else would be to see a specialist about colourblindness. I dont mean pick up a ishihara test (the one with the colour dots) Actually go see a specialist. If you do suffer from any form of colour blindness, then there is a machine that can determine if a tinted lens will work for you (I cant remember the name of the machine for the life of me) but I think there are only about 4 of them in the UK at actual opticians, so they may direct you elsewhere.
Hope this helps in some way
Appreciate the feedback

What you say makes perfect sense, and have to be honest as I type this I can't honestly say if that's the reason or not.
All I can say however is due to the nature of my profession I'm entitled to free eye examinations on a regular basis so use this 'perk' on an annual basis.
The optician I use certainly hasn't said anything in the past, but will certainly mention it to him.
It' no major ball-ache, the only time it gets me down is during these summer months when I'm constantly squinting because of the bright sun and people say "Can't you get some sun glasses", but of course I can't.
And again, sounds daft, but the only 'style' of frame that has those coloured lenses appears to be kiddie style frames.
But do really appreciate your input.