Eyegear with a mountable frame

An eyegear, comprising:

• a frame seat unit including a pair of frame seats and a bridge interconnecting said frame seats, each of said frame seats defining an accommodation space that opens downwardly and having a frame strip that defines a top side of said accommodation space;
• and
• a pair of lens units, each removably retained in said accommodation space of a respective one of said frame seats and including a lens frame and a lens, said lens frame having a ring portion for holding said lens therein,
• wherein, for each pair of said frame seat and the respective one of said lens units,
• one of said frame strip and said lens frame includes an end distal from said bridge and formed with a releasably lockable tab, said releasably lockable tab having opposite first and second sides,
• an other one of said frame strip and said lens frame being formed with first and second walls that cooperate to define an engaging slot for engagement with said releasably lockable tab, said first and second walls being respectively disposed at locations corresponding to said first and second sides of said releasably lockable tab.