# K921221: Sterile/Single Use Symblepharon Ring

- Pathway: 510(k) (Traditional)
- Applicant: Storz Instrument Co.
- Decided: Jul 17, 1992 after 126 days
- Product code: HQN (Conformer, Ophthalmic)
- Device class: 2
- Regulation: 21 CFR 886.3130
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
4 later devices descend from it; 1 cites it directly.
0 of 5 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA has not posted a summary or statement for it, so its predicates are not known.

## Most influential descendants
- K032104: Amniolens (2003), 3 descendants of its own
- K053622: Surgisis Ocular Graft (2006), 2 descendants of its own
- K090078: Kerasys Bioengineered Lamellar Patch Graft (2009), 1 descendant of its own
- K223074: CorNeat EverPatch (2023), 0 descendants of its own

Source page: https://510kreport.com/device/K921221
Methodology: https://510kreport.com/methodology