The phrase "naked eye" means seeing something with your own eyes, without using any special tools or instruments like telescopes or microscopes. Full definition
Do you think it may be possible to see with naked eyes if one wheel does not have enough contact with ground? (mechanics.stackexchange.com)
Visual perception is one of the senses, consisting of the ability to detect light and interpret (see) it as the perception known as sight or naked eye vision. (sciencedaily.com)
You don't need tons of money to witness the beauty of this planet with your own naked eyes. (blog.feedspot.com)