[Closed] Sunglasses opinions (Bolle Swat, Bolle Python), what others?

I live in Thailand so am lucky enough to need sunglasses most of the time.

I'm a primary teacher so lots of bending over etc, so need glasses that won't easily fall off. I also get to the beach etc a lot so need specs that won't fall apart or break if dropped etc.

The downside of living here is I can't buy decent glasses - they're either 'fashion' glasses or fakes.

I have pretty sensitive eyes so want a dark tint (and polarised lenses too). Glasses which I can also wear on the bike would be good.

I have to buy without trying them on, for the mother-in-law to bring out over Easter. I've an average to narrow hear.

So, strong, comfortable, dark / polarised lenses, secure fit....

[url= http://www.amazon.co.uk/Polarized-Ballistic-Safety-Glasses-SWATPOL/dp/B00CS5FPT6 ]Bolle Swat[/url] -
they seem strong, dark and added safety for riding. Are they for shooting only i.e. are they likely to fall off?

[url= http://www.amazon.co.uk/Bolle-Python-Polar-Shore-Sunglasses/dp/B004558P2G/ref=sr_1_45?s=sports&ie=UTF8&qid=1425825626&sr=1-45&keywords=sunglasses ]Bolle Python[/url] - more leisure, less sporty. Are they going to fall off?

I could always get cheapy (Jokelys etc) for mtb'ing.

Any suggestions.

What do you wear?

Under 50 pounds.

Thanks