What would happen if I used soft contact lens solution with my hard contacts?!
Question: It's "Complete Moisture Plus", one of those no-rub solution brands.
Answers: It's "Complete Moisture Plus", one of those no-rub solution brands.
There's generally no problem that way round, except for the question of effective de-greasing power: the bacteriocidal action should be fine.
Historically that soft and hard lens solutions have been different was due to incompatibility of soft lenses with hard lens solutions.
Firstly the most common preservative (Benzalkonium chloride) tended to accumulate on soft lens materials and secondly some surfactants and other cleaning chemicals which would be rinsed off the surface of a hard lens would soak into a soft one, leading to potential reaction.
A few rarer lens materials do need their own specific solutions to preserve surface characteristics.