The otoscope head used with the Welch Allyn AMD-300S is difficult to focus while used in the ear canal. A focus tool is provided on the cart to allow the fine focus to happen before using it on a patient. Not all otoscope devices require use of the focus tool.
Step 1: With the image enhancement feature on, insert the barrel of the ear scope into the focus tool.
Step 2: While viewing the image on the screen, slowly rotate the focus ring of the otoscope until it is focused.