Why doesn't he have a souped up electric scooter that does 20km/h on the slow setting? If I ever get old with all the white hair, I am gonna be old with drip and none of this cane business.
Picking up the gmilfs with my scooter with spinners and underglow at the mall in my funny cataract sunglasses. Old people get lonely and they don't have the time to dgaf anymore.
What about those wrap around cover up sunglasses?
Wise Eyewear Cover-Ups Black Fit Over Sunglasses - Wrap Around Sunglasses - People Who Wear Prescription Glasses in the Sun (Black), X-Large https://www.amazon.com/dp/B07D4QBVR5/ref=cm_sw_r_cp_api_i_AZ6cEb72PNS94
Dollar store glasses and over the glasses sun glasses.
I have no idea if this link is trustworthy or not, but for what it's worth...
Regular old man sunglasses should work too. These are pretty cool, but expensive. If it's just a one-time thing for a costume, you could just buy some $5 sunglasses and tape them up to look like the Invisible Man glasses.
Not sure about the quality or what glasses will fit underneath though
do you have a starting point of what style you like? otherwise, some suggestions --
https://www.moosejaw.com/product/julbo-vermont-classic-sunglasses_10260373
https://www.amazon.com/Cover-Ups-Black-Fit-Over-Sunglasses/dp/B07D4QBVR5