If you swapped those glasses for some contact lenses you may be interested to know that 80% of contact lenses in use these days are contaminated. Studies have shown that the brand of cleaning solution you choose has no impact either. Lenses need to be cleaned outside of the solution once per month and the cases need to be replaced frequently.
Better kill ALL the germs so you won't get harmed any time!!!!!!!111
(Might affect your immune system and cause allergies, but what the heck, hygene product manufacturers have to earn their money, don't they?)
Regards
Your hygene industry