This is the 12153rd most frequent Turkish word.
gözlüğü
"Glasses" or "eyeglasses."
Here, "gözlüğü" is possessed, referring to 'glasses of the speaker'.
Bu sabah gözlüğü takmayı unuttum.
I forgot to wear my glasses this morning.
Here, "gözlüğü" is used to indicate that the glasses, a specific item, were left behind.
Gözlüğü masada bırakmış.
She left her glasses on the table.
In this sentence, "gözlüğü" pertains to a definite object, 'the glasses' needed.