Duvall's Pincette is an instrument used in ophthalmology to grasp and remove small objects (such as foreign bodies) from the conjunctival sac of the eye.
As a tool, these tweezers work quite simply and allow a specialist to quickly and safely remove an object. It allows you to remove large foreign bodies that otherwise could remain in the eye for a long time or get stuck in it and interfere with the normal functioning of the visual apparatus. Thus, it can actually be very useful and even important for maintaining eye health.