Cleared Traditional

K173904 - CATS Tonometer Prism

K173904 is an FDA 510(k) clearance for CATS Tonometer Prism, manufactured by Cats Tonometer, LLC. The device is a Class 2 Ophthalmic device with product code HKY cleared through the Traditional 510(k) pathway after a 77-day FDA review.

K173904 · Cats Tonometer, LLC · Ophthalmic device
Download Printable Device Report (PDF)
Optimized for regulatory review, auditing and printing
Mar 2018
Decision
77d
Days
Class 2
Risk

K173904 is an FDA 510(k) clearance for the CATS Tonometer Prism. Classified as Tonometer, Manual (product code HKY), Class II - Special Controls.

Submitted by Cats Tonometer, LLC (Tucson, US). The FDA issued a Cleared decision on March 9, 2018 after a review of 77 days - a notably fast clearance cycle.

This device falls under the Ophthalmic FDA review panel, regulated under 21 CFR 886.1930 - the FDA ophthalmic device framework. The Traditional 510(k) pathway establishes clearance through substantial equivalence to a legally marketed predicate device, without requiring clinical trial data.

Device pattern: Fast-track predicate clearance. Standard predicate reliance. The short review cycle indicates strong predicate alignment - the FDA found sufficient equivalence without extended technical review.

View all Cats Tonometer, LLC devices

FDA 510(k) Submission Details - K173904

510(k) Number K173904 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received December 22, 2017
Decision Date March 09, 2018
Days to Decision 77 days
Submission Type Traditional
Review Panel Ophthalmic (OP)
Summary Summary PDF
Third-party Review No - reviewed directly by FDA
Combination Product No
PCCP Authorized No
Regulatory Context
Review time vs. panel average
33d faster than avg
Panel avg: 110d · This submission: 77d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

HKY Device Classification - Class 2, Special Controls

Product Code HKY Tonometer, Manual
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 886.1930
What this classification means

Class II devices require demonstration of substantial equivalence to a legally marketed predicate device. This pathway does not require clinical trials - it relies on engineering equivalence and performance data. Most Ophthalmic devices follow this clearance model.

Regulatory Consultant

Rockin' Regulatory, Inc.
Paul Kramsky

The regulatory consultant manages the 510(k) submission process on behalf of the applicant - coordinating technical documentation, predicate strategy and FDA communications. Identifying the consultant behind a submission is a key signal for competitive regulatory intelligence.

Regulatory Peers - HKY Tonometer, Manual

All 17
Devices cleared under the same product code (HKY) and FDA review panel - the closest regulatory comparables to K173904.
Sunkingdom Applanation Tonometer SK-R, SK-T, SK-Q
K191314 · Chongqing Sunkingdom Medical Instrument Co., Ltd. · Dec 2019
Applanation tonometer AT-2
K182491 · Takagi Seiko Co., Ltd. · Dec 2018
AT 030
K180839 · Carl Zeiss Meditec, AG · Jun 2018
TONO-PEN AVIA TONOMETER AND OCU-SHILED TIP COVER
K053430 · Medtronic Xomed, Inc. · Mar 2006
PROVIEW EYE PRESSURE MONITOR
K011199 · Bausch & Lomb, Inc. · Jul 2001
SCHIOTZ TONOMETER SPEC. 5 STRAIGHT, INCLINED, 3INCLINED SCALE
K945541 · Rudolf Riester GmbH & Co. KG · May 1995