rogerzilla wrote: Wraparound types give terrible distortion.
I found my prescription sunglasses gave distortion when I first started to wear them, but my eyes soon adjusted. It felt is if my head was a foot off the ground, but now it feels normal. In fact, if I wear my normal specs on the bike, I feel as though I’m 10 feet tall.
When I was young, I found that I couldn't wear most ordinary
sunglasses without the consequent (very slight) distortion in my FOV inducing sea-sickness symptoms, headaches etc. I couldn't for the life of me understand how people got on with prescription glasses of any kind, but as both my sisters (who inherited short sight from my Ma I think, and felt slightly cheated because I didn't have to wear glasses) tetchily explained "when you can't see stuff-all without, you soon get used to it".
These days I am (very fortunately) much less fussy about ordinary sunglasses, but (as is typical with age) I am increasingly finding I have to wear reading glasses for close work. However the distortion is such that I don't like wearing them much at all, and I am still instantly nauseous should I try and get up and walk around when I've got even fairly weak reading glasses on. I guess I shall have to 'get used to it' because as time goes on I am certain to need them more and more, even if I retain reasonable uncorrected distance vision.
In comparable instances;
- I have had a minor eye injury that distorted the retina slightly in one eye; it took months to get used to it, and I'm not sure to what extent my brain accommodated and to what extent the distortion physically reduced. But in the meantime I found doing more or less anything
unusually tiresome, I got more headaches than normal, and even my mood was affected.
- I once spent some time (ab-)using my vision such that I trained myself to look at 'stereo pair' photographs without
the aid of a proper stereo viewer. This involves breaking the conditioning that exists between where your eyes are pointed vs what focus they should use . However whilst I could (with practice) do this, it was not without consequence; headaches, nausea, and mood change were not uncommon, and eventually I gave up trying to work in that way, because it so often made me feel so peculiar. To this day I can't happily use binoculars (or a binocular type microscope) unless the alignment is pretty well perfect, not unless I want to make myself feel ill, that is.
So I have every sympathy with those that are conscious of distortion and are troubled by it. However provided there is at least some flexibility in the brain ( called 'neuroplasticity' I think) you should accommodate to many such things with practice.