this has been baffling me for 6 months now, and I'm wondering if anyone else is finding a similar problem to me.

I can't see HD on my HDTV. Like, I can see literally no difference between and HD channel and a non-HD channel. My boyfriend keeps flicking it back and forth to demonstrate, and I can't see any change. He says it's as different as the change between analogue and digital, is that true?

Can anyone else not see it? I wear contact lenses and I think one of them needs a slightly stronger prescription, could that be affecting it?