The description of the Crafter's Eyepiece item says (emphasis mine):
When you Repair an item, increase the Hit Points restored by 15 per proficiency rank instead of 10.
However, the description of the Repair action says (italics for emphasis mine):
Critical Success You restore 10 Hit Points to the item, plus an additional 10 Hit Points per proficiency rank you have in Crafting (a total of 20 HP if you’re trained, 30 HP if you’re an expert, 40 HP if you’re a master, or 50 HP if you’re legendary).
Success You restore 5 Hit Points to the item, plus an additional 5 per proficiency rank you have in Crafting (for a total of 10 HP if you are trained, 15 HP if you’re an expert, 20 HP if you’re a master, or 25 HP if you’re legendary).
So either the Crafter's Eyepiece meant "instead of 5", or it only works on a Critical Success. The latter is unlikely, Critical Success is always mentioned if it is a requirement.
Has this just remained from the playtest? How much HP has Repair restored there?
More importantly, should Crafter's Eyepiece say "increase the Hit Points restored by 10 per proficiency rank instead of 5"?