| Naics index | Naics index description |
|---|---|
| 333310 | Lens coating (except ophthalmic) |
| 333310 | Lens grinding (except ophthalmic) |
| 333310 | Lens hoods, camera, manufacturing |
| 333310 | Lens mounting (except ophthalmic) |
| 333310 | Lens polishing (except ophthalmic) |
| 333310 | Lenses (except ophthalmic) manufacturing |
| 333310 | Letter folding, stuffing, and sealing machinery manufacturing |
| 333310 | Light meters, photographic, manufacturing |
| 333310 | Locks, coin- or card-operated, manufacturing |
| 333310 | Loupes (e.g., jewelers) manufacturing |