The Flieringa Ring Set (16 Rings) is a set of specialized instruments used in scleral fixation surgeries in ophthalmology, designed to secure intraocular lenses (IOLs) or other ocular implants when there is insufficient natural support from the eye's structures, such as the lens capsule or zonules. The set typically includes 16 different rings, allowing the surgeon to select the appropriate size for different patient anatomies and surgical needs.