3D glasses for medical glasses

I tried NDS 3D, couldn't see a thing, I guess it requires the 3D glasses, so I looked for one suitable, turn out anyone who can't see without glasses can use this 3D glasses, sadly, I can't find it, and if you can get two lenses you can replace it at ma7al natharat to look like this.

other way, is just to purchase it, fond one here costs 4$

maybe there is even better.