The Lens Measuring Instrument,ophtha, cataloged under National Stock Number 6540-01-640-9565, is classified within Federal Supply Class 6540 (Ophthalmic Instruments, Equipment, and Supplies) of the Medical, Dental, and Veterinary Equipment group. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6540-01-640-9565 |
| Item Name | Lens Measuring Instrument,ophtha |
| FSC / FSG | 6540 / 65 — Ophthalmic Instruments, Equipment, and Supplies |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Unit of Issue | EA |
| Reference | Meaning |
|---|---|
| 1248372 | 5/1 Secondary reference U.S. Government activity |
| OLMI | 3/1 Design control — primary reference Department of the Army U S Army Medical Material Agency Mcmr-Mmo-Sa |
| 6540NCM141536 | 5/1 Secondary reference Defense Medical Standardization Board |
NSN 6540-01-640-9565 is a Lens Measuring Instrument,ophtha, classified under FSC 6540, Ophthalmic Instruments, Equipment, and Supplies. Status: active.
Key specifications for 6540-01-640-9565: Special Features: A LENSMETER OR LENSOMETER, IS AN OPHTHALMIC INSTRUMENT USED TO VERIFY THE CORRECT PRESCRIPTION IN A PAIR OF EYEGLASSES, TO PROPERLY ORIENT AND MARK UNCUT LENSES, AND TO CONFIRM THE CORRECT MOUNTING OF LENSES IN SPECTACLE FRAMES; THE LENSMETERS CAN ALSO VERIFY THE POWER OF CONTACT LENSES, WHEN A SPECIAL LENS SUPPORT IS USED; CAN MEASURE THE SPHERE, CYLINDER, AXIS, ADD, AND IN SOME CASES, PRISM; Part Name Assigned by Controlling Agency: LENS MEASURING INSTRUMENT OPHTHALMIC DEVICE CODE 12326. 0 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.