It is not recommended to rub the eye to remove foreign bodies by rubbing it with your hands. The human eye consists of the wall of the eye and the contents of the eye. The wall of the eye is divided into three layers, the outermost being the cornea and sclera, while the conjunctiva covers the outside of the sclera. Therefore, the conjunctiva, cornea, and sclera form the outer barrier of the eye, maintaining the integrity of the eye, resisting and feeling external stimuli, and protecting the eye’s contents. When the eyes are filled with hard foreign bodies, such as dust, sand, bugs, wood chips, iron filings, etc., or soft foreign bodies, such as hair (hair, eyelashes, animal hair, etc.), liquids, etc., they will adhere to the outermost layer of the cornea or conjunctiva, and if the hands are not hygienic at this time, rubbing will likely cause eye scratches and bacterial infections, causing keratitis, conjunctivitis and other eye diseases.