Cleared Traditional

K031733 - NON-CONTACT TONOMETER

K031733 is the FDA 510(k) clearance for NON-CONTACT TONOMETER by Nidek, Inc.. It is a Class 2 Ophthalmic device (product code HKX) cleared through the Traditional 510(k) pathway after a 183-day FDA review.

K031733 · Nidek, Inc. · Ophthalmic device
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Dec 2003
Decision
183d
Days
Class 2
Risk

K031733 is an FDA 510(k) clearance for the NON-CONTACT TONOMETER, MODEL NT-4000. Classified as Tonometer, Ac-powered (product code HKX), Class II - Special Controls.

Submitted by Nidek, Inc. (Lake Forest, US). The FDA issued a Cleared decision on December 4, 2003 after a review of 183 days - an extended review 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: Standard predicate-based submission. Standard predicate reliance. This clearance follows a standard predicate-based equivalence path within the Ophthalmic review framework, consistent with the majority of Class II 510(k) submissions.

View all Nidek, Inc. devices

Submission Details

510(k) Number K031733 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received June 04, 2003
Decision Date December 04, 2003
Days to Decision 183 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
73d slower than avg
Panel avg: 110d · This submission: 183d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code HKX Tonometer, Ac-powered
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 Peers - HKX Tonometer, Ac-powered

All 22
Devices cleared under the same product code (HKX) and FDA review panel - the closest regulatory comparables to K031733.
Keeler TonoCare Tonometer
K181143 · Keeler Instruments, Inc. · Feb 2019
Tono Vue Non-Contact Tonometer
K180820 · Crystalvue Medical Corporation · Dec 2018
PULSAIR INTELLIPUFF, PULSAIR DESKTOP MODEL 2414-P-2001, 2417-P-2000
K093298 · Keeler Instruments, Inc. · Dec 2010
MODEL 30 CLASSIC PNEUMATONOMETER
K002395 · Xomed, Inc. · Dec 2000
KEELER PULSAIR 3000 NON CONTACT TONOMETER
K990257 · Keeler Instruments, Inc. · Mar 1999
CANON TX-10 TONOMETER
K963079 · Canon USA, Inc. · Mar 1997