I would like to describe a person who returns from a mind-relaxing break back to work by the idiom "fresh pair of eyes". However, as per its definition on some sources, "a fresh pair of eyes" is "another person [...]", which made me think that maybe it is not suitable.
The situation I am imagining is of a person who worked longer than he/she expected to find the evident (by the incorrect outcome) mistake in his/her work, goes out for a break, then returns back to examine his work again for the mistake. I would like to describe the property of this man/lady being refreshed by the break, and in a concise and effective manner.
Does the idiom "a fresh pair of eyes" fit into this description? If not, then what else should be my phrase of choice?