Well, if you want to summon a piece of equipment, it must be equipped in the corresponding position, so the cloth occupation can't summon a plate armor, DK can't summon a QS T2, and the general engineering eye needs engineering skills, and people who don't practice engineering can't summon it. Netherstorm has a task to reward a pair of cloth glasses, called goggles for third-class junior technicians. In addition, Audoul's flaming beast seems to have dropped a helmet with the appearance of eyes, but it was locked by a chain. Most other glasses are limited by engineering.