The term "naked eye" means that there is nothing helping the eye to see. for example, if you are using glassess or a telescpoe, then you are not using the naked eye.

No. But yes. Yeast is a microbe but it is visible with the naked eye

When you look at your blood with the naked eye all you see is red liquid. This is all anyone sees with the naked eye.

The term "Naked eye" refers to your vision or able to be seen without the aide of a microscope or telescope.

Mercury, Venus, Mars, Jupiter, and Saturn can be seen with the naked eye.