Step 1: Be using the lens
Step 2: Use another item that has an item script
Step 3: Watch as the item script that is supposed to run will repeatedly run every single/other frame until you stop using the lens

Basically, the lens is like a machine gun, only with scripts. Any item that has an item script will have it's item script be run repeatedly and rapidly if you use the item while you have the lens on until you turn off the lens. Tested in both Zodiac: Story of the Guardian and Link's Quest for the Hookshot 2. Only tested with swords that have an item script so far. Could someone please test if this is the case for other item types besides sword?