| HKY — Tonometer, Manual | Class 2 / OP |
| HKZ — Sterilizer, Tonometer | Class 1 / OP |
| HLA — Calibrator, Tonometer | Class 2 / OP |
| HLC — Instrument, Measuring, Stereopsis | Class 1 / OP |
| HLD — Engine, Trephine, Accessories, Gas-Powered | Class 1 / OP |
| HLE — Ruler, Nearpoint (Punctometer) | Class 1 / OP |
| HLF — Device, Measuring, Lens Radius, Ophthalmic | Class 1 / OP |
| HLG — Pupillometer, Ac-Powered | Class 1 / OP |
| HLH — Pupillometer, Manual | Class 1 / OP |
| HLI — Ophthalmoscope, Ac-Powered | Class 2 / OP |
| HLJ — Ophthalmoscope, Battery-Powered | Class 2 / OP |
| HLK — Screen, Tangent, Target, Battery-Powered | Class 1 / OP |
| HLL — Monitor, Eye Movement | Class 2 / OP |
| HLM — Instrument, Measuring, Lens, Ac-Powered | Class 1 / OP |
| HLN — Gauge, Lens, Ophthalmic | Class 1 / OP |
| HLO — Test, Spectacle Dissociation, Battery-Powered (Lancaster) | Class 1 / OP |
| HLP — Target, Fusion And Stereoscopic | Class 1 / OP |
| HLQ — Keratoscope, Ac-Powered | Class 1 / OP |
| HLR — Keratoscope, Battery-Powered | Class 1 / OP |
| HLS — Exophthalmometer | Class 1 / OP |
| HLT — Preamplifier, Ac-Powered, Ophthalmic | Class 2 / OP |
| HLW — Preamplifier, Battery-Powered, Ophthalmic | Class 2 / OP |
| HLX — Photostimulator, Ac-Powered | Class 2 / OP |
| HLZ — Electrode, Corneal | Class 2 / OP |
| HMC — Monitor, Eye Movement, Diagnostic | Class 2 / OP |
| HMD — Chair, Ophthalmic, Manual | Class 1 / OP |
| HME — Chair, Ophthalmic, Ac-Powered | Class 1 / OP |
| HMF — Stand, Instrument, Ac-Powered, Ophthalmic | Class 1 / OP |
| HMG — Stand, Instrument, Ophthalmic, Non-Powered | Class 1 / OP |
| HMH — Rack, Skiascopic | Class 1 / OP |
| HMJ — Screen, Tangent, Projection, Battery-Powered | Class 1 / OP |
| HMK — Euthyscope, Ac-Powered | Class 2 / OP |
| HML — Euthyscope, Battery-Powered | Class 1 / OP |
| HMM — Distometer | Class 1 / OP |
| HMN — Suture, Nonabsorable, Ophthalmic | Class 3 / SU |
| HMO — Suture, Absorbable, Ophthalmic | Class 3 / SU |
| HMP — Pad, Eye | Class 1 / SU |
| HMQ — Marker, Sclera | Class 1 / OP |
| HMR — Marker, Ocular | Class 1 / OP |
| HMS — Drum, Eye Knife Test | Class 1 / OP |
| HMT — Drape, Patient, Ophthalmic | Class 2 / HO |
| HMW — Drape, Microscope, Ophthalmic | Class 2 / HO |
| HMX — Cannula, Ophthalmic | Class 1 / OP |
| HMY — Keratome, Battery-Powered | Class 1 / OP |
| HMZ — Trabeculotome | Class 1 / OP |
| HNA — Spud, Ophthalmic | Class 1 / OP |
| HNB — Spoon, Ophthalmic | Class 1 / OP |
| HNC — Specula, Ophthalmic | Class 1 / OP |
| HND — Spatula, Ophthalmic | Class 1 / OP |
| HNE — Snare, Enucleating | Class 1 / OP |