Enjoy the beer that you deserve.
What it does :
A specific homebrewing use for eye-droppers is to add drops of iodine to a mash sample to determine the degree of starch conversion that has occurred.
What it is:
An eye-dropper is a device used to dispense fluid in small, controlled amounts.
How it works:
Eyedroppers should not used for dispensing beer for consumption. For that purpose see the entry for tap.
Eye-droppers are used during the hot side of brewing (e.g. wort preparation). However, they do not come into contact with the wort. So, simply keep them cleaned for use.