Mexican
los lentes
Se me olvidaron los lentes.
I forgot my glasses.
Eyeglasses
Rioplatense
los anteojos
Se me olvidaron los anteojos.
I forgot my glasses.
Castilian
las gafas
Se me olvidaron las gafas.
I forgot my glasses.
Mexico commonly uses lentes for eyeglasses. Argentina and Uruguay often say anteojos (lentes is also heard). Spain uses gafas. None of these is a "simpler" or "harder" word; they are regional defaults for the same object.