# NSN 6540-01-719-7739: Light, Slit, Ophthalmic

NSN 6540-01-719-7739 (also written 6540017197739; NIIN 01-719-7739) is a light, slit, ophthalmic in Federal Supply Class 6540, Ophthalmic Instruments, Equipment, and Supplies. 6 manufacturer part numbers from 6 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 6540-01-719-7739 (6540017197739)
- NIIN: 01-719-7739 (017197739)
- Item name: LIGHT,SLIT,OPHTHALMIC
- Federal Supply Class: [FSC 6540 Ophthalmic Instruments, Equipment, and Supplies](https://nsnexplorer.com/fsc/6540/)
- Federal Supply Group: [FSG 65](https://nsnexplorer.com/group/65/)
- Acquisition method suffix code: AMSC Z: a commercial, nondevelopmental or off-the-shelf item. (observed 2026-10-10)
- Acquisition method code: 4

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ASXH | VOLTAGE RATING IN VOLTS | DC MINIMUM 3.0 AND DC MAXIMUM 4.8 |
| AXGY | MOUNTING METHOD | FREE STANDING BASE |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | HAND-HELD SLIT LAMP |
| FEAT | SPECIAL FEATURES | SLIT LAMP IS A NON-INVASIVE DEVICE THAT IS ABLE TO ILLUMINATION, MAGNIFICATION AND OBSERVATION THE HUMAN EYE; MAGNIFICATION 10X AND 16X; 3 X AA NI-MH BATTERIES. OPHTHALMIC DIAGNOSTIC INSTRUMENTS DESIGNED FOR EXAMINING THE EYE (MOSTLY THE ANTERIOR PART OF THE EYE) USING AN ILLUMINATION SYSTEM COMBINED WITH A BINOCULAR MICROSCOPE. THE INSTRUMENTS USUALLY CONSIST OF ILLUMINATION SOURCES WITH A MECHANISM THAT PROVIDES A SLIT BEAM OF LIGHT INTO THE EYE WITH DIFFERENT TYPES OF ILLUMINATION (E.G., DIRECT OR INDIRECT, FOCAL OR DIFFUSE, BACKGROUND ILLUMINATION), A BINOCULAR MICROSCOPE FOR VIEWING THE MAGNIFIED SLIT IMAGE, AND A CONTROL COMPONENT FOR ADJUSTING THE FOCUS OF THE MICROSCOPE AND THE SLIT (E.G., SLIT ROTATION, SLIT WIDTH); SOME ALSO HAVE REFRACTION MIRRORS TO DIRECT LIGHT TO A CAMERA MOUNTED ABOVE THE MICROSCOPE. SLIT LAMPS PROVIDE A MAGNIFIED VIEW OF EYE STRUCTURES (E.G., EYELID, SCLERA, IRIS, CRYSTALLINE LENS, CORNEA). |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 1668546 | 89875 | DEFENSE LOGISTICS AGENCY DIRECTORATE OF MEDICAL MATERIEL DEFENSE SUPPLY CENTER PHILADELPHIA | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 6540NCM249697 | 64616 | DEFENSE MEDICAL STANDARDIZATION BOARD | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| SL-19 | 6V082 | KOWA OPTIMED INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| SL-19 | 9ZUH7 | KOWA AMERICAN CORPORATION DIV VISION SYSTEMS DIVISION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| SL-19 SLIT LAMP | 55CB9 | THE JANZ CORP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| SLKOW-SL19 | 3H2D2 | OPTIMETRICS INC DBA OPTIMETRICS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=6540017197739&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=6540017197739
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- All data is public U.S. government data; every row above links to its source record where one exists.

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