# K203850: CATS®-D Tonometer Prism

- Pathway: 510(k) (Traditional)
- Applicant: Cats Tonometer, LLC
- Decided: Jun 14, 2021 after 165 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
Longest line of descent: 2 generations back to K981432 (1999). 2 ancestors in all.
No later device cites it as a predicate yet.
0 of 3 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K173904: CATS Tonometer Prism, Cats Tonometer, LLC (2018) Summary page 4.

## Indications for use
The CATS®-D Tonometer Prism is intended to be used with Goldmann type tonometers for the measurement of intraocular pressure of the human eye.

Source page: https://510kreport.com/device/K203850
Methodology: https://510kreport.com/methodology