いちDay でい使 つか てコンタクトレンズであれば
ichide i tsukaisutekontakutorenzudeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 1Day使い捨てコンタクトレンズ

1. If [it] were daily disposable contact lenses; If [it] is a daily disposable contact lens

Ba Conditional