"Visual confirmation" means receiving proof or evidence through sight, usually by observing something directly with one's eyes, to ensure something is true or accurate. Full definition
A LED light also provide visual confirmation that installation is correct. (carseat.se)
You will need a physical and / or visual confirmation from a private veterinarian stating that euthanasia is in the best interest of the animal. (humanesocietymiami.org)
The pilot of the helicopter overhead tells me the road is clear, but my instinct for self - preservation would prefer visual confirmation. (automobilemag.com)