# K022054: F 900

- Pathway: 510(k) (Traditional)
- Applicant: C.S.O. S.R.L.
- Decided: Aug 6, 2002 after 43 days
- Product code: HKY (Tonometer, Manual)
- Device class: 2
- Regulation: 21 CFR 886.1930
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
6 later devices descend from it; 1 cites it directly.
0 of 7 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA’s file for it is a 510(k) statement, which names no predicate.

## Most influential descendants
- K093445: Keeler Applanation Tonometer; T-Type Kat, K-Type Kat, (Kat) (2010), 5 descendants of its own
- K133234: T-Type D-Kat, R-Type D-Kat (2014), 4 descendants of its own
- K142179: D-Kat Z-Ype (2014), 2 descendants of its own
- K232143: Applanation Tonometer HT-5000 (2023), 0 descendants of its own
- K191314: Sunkingdom Applanation Tonometer SK-R, SK-T, SK-Q (2019), 0 descendants of its own

## Indications for use
A manual device intended to measure intraocular pressure by applanation (applying a small flat disk to the cornea)

Source page: https://510kreport.com/device/K022054
Methodology: https://510kreport.com/methodology