naked eye

Most neurons are collected into packages of one sort or another, sometimes visible to the naked eye.
در این جا به معنای چشم غیر مسلح است.

چشم غیر مسلح

Bare eye . بدون ابزار ( تلسکوپ و. . . ) به جایی نگاه کردن

Naked eye
چشم غیر مسلح ، به ظاهر

To the" naked eye" she is a normal girl
"به ظاهر" او یک دختر معمولی است

Mushrooms grow from spores ( not seeds ) that are so tiny you can't see individual spores with the naked eye. Rather than soil, these spores rely on substances like sawdust, grain, straw, or wood chips for nourishment. A blend of the spores and these nutrient sources is called spawn

چشم غیرمسلح