1. Wash your hands, dive mask, and DiveOptx lenses with oil free liquid soap and warm water to remove any dust and oils. 2. With clear warm water in the inside wells of your dive mask, press one DiveOptx onto the bottom 25% of each lens. The DiveOptx centers should be approximately 2.5 inches apart. 3. To check for proper placement, put on your dive mask and look through the DiveOptx. Placement adjustments are easily made by sliding your DiveOptx lenses while they are still wet. 4. When done, pat dry with a lint-free towel. Let your DiveOptx dry completely before using. DiveOptx are removable, leave no residue, and can be reinstalled by repeating these instructions.