| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Lens expressor | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Lens spoon | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Hand-held campimeter | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Perfluoropropane cylinder | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Pupillometer, line-powered | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Pupillometer, manual | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Anterior eye segment analysis system | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Anterior eye segment analysis system application software | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Phorometer | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Photographic paper | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Nystagmus inducing optokinetic drum | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Nystagmus inducing tape | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ocular ink pen | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ocular occluder | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic applicator | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic caliper | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic camera | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic cannulation set, reusable | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic cannulation set, single-use | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic chair, electric | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Pleoptophor | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Medical device integration rack | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic chair, manual | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic distometer | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic flash generator | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic head reflector | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic insufflator | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic irrigation/aspiration pump | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic knife test drum | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic refractometer, automated | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic refractometer, manual | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic sponge | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic surgical instrument handle quick lock adaptor | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic surgical irrigation handle, single-use | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic trocar | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic ultrasound imaging system | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic ultrasound imaging system transducer | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic ultraviolet phototherapy solution | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmic ultraviolet phototherapy system | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmodiaphanoscope | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmodiastimeter | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmoleukoscope | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Polatest | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ophthalmotropometer | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Optical low coherence reflectometry (OLCR) biometer | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Optical pachymeter | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Optomyometer | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Orbital retractor | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Posterior eye segment analysis system application software | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Prism bar | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Prism, rotary | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Schirmer tear test strip | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Scleral marker | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Scleral plug, reusable | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Scleral plug, single-use | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Scotometer | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Sulfur hexafluoride cylinder | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Trabeculotome | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Retinal optical coherence tomography system | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Retinal tack | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Retinoscope, battery-powered | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Retinoscope, line-powered | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Reverse-image mirror | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Synoptophor, battery-powered | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Synoptophor, line-powered | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Slit lamp control unit | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Tachistoscope | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Tearscope | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Ultrasonic pachymeter | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Vision training device, battery-powered | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Vision training device, line-powered | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Visual acuity light box | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Visual acuity projector | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Visual field plotter | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Binocular vision test unit | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Color discrimination tester | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Color discrimination tester, quick-test | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Color-discrimination eye chart | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Corneal light shield | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Corneal marker | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Corneal marking pad | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Corneal resection holder | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Corneal storage medium | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Corneal topography system | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Dynamic visual acuity testing system | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Eikonometer | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Diplopiometer | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Donor cornea delivery set | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Entoptoscope | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Electrooculograph | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Electroretinograph | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Eye brush | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Eye dye | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Eye magnet, non-powered | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Eye magnet, powered | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Eye muscle clamp | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Eye retractor | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Eye speculum, reusable | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Eye speculum, single-use | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Eye spud | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  | 
| Eye spud/needle | Is a | False | Ophthalmic device | Inferred relationship | Existential restriction modifier |  |