I actually found him fairly unhelpful when I was looking some years back. Awful website (in general), poor selection of products and slow email replies. He does come well recommended by many though, so I may just have been unlucky/picky.
Having bought now three pairs of goggles and having the prescriptions sent off to have inserts glazed, I've come to the conclusion that it's quite easy and really doesn't much specialist input at all if you're already used to buying glasses. Pick a reputable brand (Bolle, ESS, Revision, Oakley to name but a few), pick a good pair of goggles/shooting glasses and 9 times out of 10 they
will have a prescription insert available that you can buy through that same retailer you're buying from. Failing that you can just buy separately through eBay. Unglazed prescription inserts run between £5 to £30.
- Go to your opticians of choice, get your prescription*
or
- Phone/email and ask them to print and post you a past one
- Measure your pupillary distance with the help of someone (some opticians will even do it for you if you ask)
- Fill out a form online and send in your inserts to be glazed*
Edit
*both of these are to be done by actual professionals
End edit
It's super simple. I've used
http://www.directsight.co.uk/reglaze and
https://www.glassesdirect.co.uk/reglaze/ - each took under a week to get done and cost ~£50 for the much thinner lenses, scratch-resistant coating and UV protection (though I only have a pretty weak/basic prescription so it might cost more for more complex ones). At the very least you will want the scratch-resistant coating.
In terms of fogging: It is worse because you have another two surfaces inside. I started with ESS V12s and have now moved onto Revision Locust fan goggles with a thermal lens (which I'm yet to try). As with all fogging it depends on how much you run and how much you sweat - it's a combination of both genetic and environmental factors. Cold day means more fogging, some people just sweat more around their eyes (obviously if you're in better shape then this is generally less of an issue), some peoples face protection deflects their breath up into their goggles, there are those that like to run more so naturally will sweat more etc. There's the big one that actually shooting glasses will be basically void of fogging in the majority of cases (if anti-fog is used and you're observing where your face protection is), but there are those (myself included) that prefer the safety of full-seal eye protection.
I should also add that certain goggles have inserts that are better designed than others. My V12s 'VICE' prescription insert, for example, is/was tricky to remove between games (and basically impossible with gloves on) to reapply anti-fog solution to. Also tricky to not get your fingers on the lenses whilst doing this as they're only partially rimmed. The Locusts I now have clip in much more simply and are fully rimmed.
Again, you can expect fogging to be worse, but it is manageable with some good anti-fog products and careful orientation of your face protection so it's not making matters worse. Depending on the goggles you may need to remove foam to make sure air circulation is better (the V12s being a good example of where this is basically required from the get-go for most people). These are not problems faced exclusively by those using prescriptions though and there are plenty of threads on this already.
In summary: It isn't rocket science and your main foe is still going to be fogging in the same way that it is for non-prescription eyepro.
