Auto REF/Keratometer
The NIDEK AUTO REF/KERATOMETER ARK-1s measures spherical, cylindrical refractive errors, and cylinder axis from the refractive status of the patient’s eye. In addition, subjective test is…
The NIDEK AUTO REF/KERATOMETER ARK-1s measures spherical, cylindrical refractive errors, and cylinder axis from the refractive status of the patient’s eye. In addition, subjective test is performed with the built-in charts and lenses for subjective measurement. The keratometer measures the corneal curvature radius (corneal refractive power), principal meridian directions, and corneal cylindrical power.
Who Else Makes It
Concentrated in Jiangsu (4), Shanghai (4), Beijing (2). 2 of them are registered as contract manufacturers, able to build to a buyer’s own specification.
| Manufacturer | City | Province | Registered as | Device types |
|---|---|---|---|---|
| Wuxi Zontai Int’l Corporation Ltd. | Wuxi | Jiangsu | Contract manufacturer | 22 |
| Taiyuan North China Xinyuan Tech. Center (Co., Ltd.) | Taiyuan | Shaanxi | Contract manufacturer | 14 |
| Beijing Hongdee Corporation | Beijing | Beijing | Private-label distributor | 43 |
| Taizhou City K&W International Trade Co., Ltd. | Jiangyan | Jiangsu | Repacker / relabeller | 38 |
| Lianyungang Tiannuo Optical Instrument Co., Ltd. | Lianyungang | Jiangsu | Contract manufacturer | 31 |
| Shanghai Link Instruments Co., Ltd. | Changzhou | Jiangsu | Manufacturer | 21 |
| Gino Optical (Shanghai) Co., Ltd. | Shanghai | Shanghai | Manufacturer | 15 |
| Shanghai Mediworks Precision Instruments Co., Ltd. | Shanghai | Shanghai | Contract manufacturer | 13 |
| Chongqing Sunkingdom Medical Instrument Co., Ltd. | Chongqing | Chongqing | Manufacturer | 11 |
| Ningbo Ming Sing Optical R&D Co., Ltd. | Ningbo | Zhejiang | Repacker / relabeller | 9 |
| Shenzhen Certainn Technology Co., Ltd. | Shenzhen | Guangdong | Manufacturer | 7 |
| Chongqing Yeasn Science-Technology Co., Ltd. | Chongqing | Chongqing | Contract manufacturer | 5 |
Showing 12 of 17. All 17 manufacturers in China registered for Refractometer, Ophthalmic
Record
| Listed by | Nidek Incorporated, United States |
|---|---|
| FDA product code | HKO |
| Device type | Refractometer, Ophthalmic |
| Device class | Class 1 |
| Regulation | 21 CFR 886.1760 |
| Establishment | Specification developer, Manufacturer |
| Premarket notification | Exempt |
| Record published | 2018-04-20 |
| Record revised | 2020-12-21 (version 4) |
Specifications
| MRI safety | Labeling does not contain MRI Safety Information |
|---|---|
| Prescription | Prescription only |
| Label carries | serial number |
Catalogue Numbers
| Catalogue number | Size | Status |
|---|---|---|
| ARK-1s | In distribution | |
| ARK-1 | In distribution | |
| ARK-1a | In distribution |
Same Product Code
| Product | Sold by | Catalogue numbers |
|---|---|---|
| Righton | Right MFG. Co., Ltd. | 27 |
| Welch Allyn, Inc. | Welch Allyn, Inc. | 13 |
| Visionix | Right MFG. Co., Ltd. | 13 |
| Auto REF/Keratometer | Ningbo Ming Sing Optical R&D Co., Ltd. | 6 |
| Microclear | Suzhou Microclear Medical Instruments Co., Ltd. | 6 |
| Rexxam | Rexxam.co., Ltd. | 5 |
| Auto Refractometer | Nidek Incorporated | 4 |
| plusoptiX 12 | Plusoptix Gmbh | 4 |
| Auto Refkeratometer | Tomey Corporation | 4 |
| MediWorks | Shanghai Mediworks Precision Instruments Co., Ltd. | 3 |
| Auto Refractometer RM-800 | Topcon Corp. | 3 |
| Yeasn | Chongqing Yeasn Science-Technology Co., Ltd. | 3 |
Showing 12 of 52. All products under Refractometer, Ophthalmic
510(K) Clearances
| Clearance | Decision date |
|---|---|
| K902500 | 1990-07-27 |
| K901513 | 1990-06-08 |
| K890559 | 1989-02-27 |
| K882191 | 1988-07-01 |
| K861065 | 1986-04-09 |
| K861062 | 1986-04-04 |
| K861066 | 1986-04-04 |
| K831083 | 1983-06-10 |
Recalls
2 of these are Class II. Class II means a temporary or reversible health consequence. Volume alone is not a quality signal: a manufacturer that ships more recalls more.
| Initiated | FDA class | Root cause | Reason | Quantity | Closed |
|---|---|---|---|---|---|
| 2017-12-20 | Class II | Equipment maintenance | There is possibly a difference between the measured dioptric value of the subjective measurement mode and the objective measurement mode on ARK-1s. | 63 untis | 2019-03-18 |
| 2015-06-15 | Class II | Software design | Software bug was found where there was no difference in Total and Corneal high-order aberrations, but differences were found in Internal high-order aberrations. | 3836 | 2016-04-25 |
Source: U.S. FDA establishment registration and device listing records, public domain. Restructured for clarity and searchability. Not affiliated with or endorsed by the FDA. Records are records: nothing here is an offer of sale.