Proper usage is critical for the effectiveness of face shields and goggles. Here are the key steps: 1. Hand Hygiene: Always perform hand hygiene before and after putting on and removing PPE. 2. Fit: Ensure that the face shield or goggles fit snugly and cover the entire face or eyes, respectively. 3. Adjust: Adjust the straps or headbands to secure the PPE in place without causing discomfort. 4. Compatibility: Make sure that the face shield or goggles are compatible with other PPE, such as masks and respirators, to ensure comprehensive protection.