Multiple Vision Enhancements, or "The Contact Lenses of Doom" Options

[Narmio]

Mechanical and electrical vision enhancements, those added by devices outside the body, now provide the full range of benefits that cyberware enhancements used to.

While this makes sense, the advances in technology should allow for this, I'm a little wary about allowing every character to start with Lowlight, Thermo, Vision Enhancement 3, Vision Magnification, Image Link, Smartlink contact lenses. It's only 1225Y, after all.

I can't, however, see any limits on how many mods can be added to a single device.

I also can't see any rules saying that multiple mods can be added to a single device, so one could make an argument for that, despite previous editions having things likw Low light + Thermo goggles.

Another possible would be to add the availabilities together, rather than use the highest, so the above Contact Lenses of Doom would have avail 28, problem solved for character generation, and severely gimped for most games. Why not throw in Ultrasound, for that wonderful avail 36?

Another solution, one I'm actually surprised didn't make it into the book, would be a Capacity system. Virtually every single other device/sensor combo like this has capacities, what happened to image mods?

Discuss.