| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Laser-generated electromagnetic radiation | Is a | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Ultraviolet radiation | Is a | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Light emitted from a tungsten light source | Is a | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Light emitted by the sun | Is a | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Visible light, electromagnetic radiation | Is a | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Light and ultraviolet light radiation | Is a | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Repair of retinal detachment with xenon arc photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Monochromator phototest | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Actinic lichen planus | Causative agent | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Photocoagulation burn to retina | Causative agent | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Broad band source phototest | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Lesion provocation phototest | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Psoralen and long-wave ultraviolet radiation test | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Destruction of lesion of choroid by xenon arc photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Photoallergy | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 2 | 
| Bowenoid actinic keratosis | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 3 | 
| Photocoagulation of eye | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Reattachment of choroid and retina by photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Photokeratitis | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Repair of retina for retinal tear or defect by xenon arc photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Welders' keratitis | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Disseminated superficial actinic porokeratosis | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Destruction of chorioretinal lesion by xenon arc photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Contact dermatitis caused by light, except sun | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Destruction of lesion of choroid by photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Repair of retina for retinal tear or defect by photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Iridotomy by photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Photocoagulation of orbital lesion | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Reattachment of choroid and retina by xenon arc photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Destruction of chorioretinal lesion by photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Destruction of lesion of retina by xenon arc photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Photocoagulation of iris | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Repair of retina for retinal detachment by photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Destruction of lesion of retina by photocoagulation | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Extracorporeal photopheresis | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Phototoxicity | Causative agent | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Photosensitivity test | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Photosensitivity | Causative agent | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Food-induced photosensitivity | Causative agent | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 2 | 
| Contact dermatitis due to light (excluding sunlight) | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Phototherapy complication | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Photoptarmosis | Causative agent | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Other specified photocoagulation of retina for detachment | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Photocoagulation of retina for detachment NOS | Using | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Light and ultraviolet-induced dermatosis | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Phototherapy skin rash | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 4 | 
| Other acute skin changes due to ultraviolet radiation | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Hydroa vacciniforme | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Actinic prurigo | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Idiopathic photodermatosis | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Acute phototoxic reaction | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Solar pruritus | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Brachioradial pruritus | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Photoaggravation of disorder | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Photoaggravated psoriasis | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Photoaggravated rosacea | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Psoralen and long-wave ultraviolet radiation phototherapy burn | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Monochromator phototest | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Photic retinopathy | Causative agent | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Broad band source phototest | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Lesion provocation phototest | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Psoralen and long-wave ultraviolet radiation test | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Extracorporeal photopheresis | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Photosensitivity test | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Visible light therapy | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Local actinotherapy | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Kromayer treatment | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Phototherapy: sleep regulation | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Phototherapy - NEC | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Phototherapy: mood regulation | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Photodynamic therapy | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Modified Goeckerman regimen | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Light therapy | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Theraktin treatment | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Mercury vapor lamp treatment | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Bililite therapy with ultraviolet light | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier |  | 
| Light therapy for inflammation | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| General actinotherapy | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Photochemotherapy | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Phototherapy of newborn | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Photochemotherapy with tar and petrolatum | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Visible light therapy NOS | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Phototherapy: mood regulation | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Bililite therapy with ultraviolet light | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 2 | 
| Local actinotherapy | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Photodynamic therapy | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Modified Goeckerman regimen | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Theraktin treatment | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Mercury vapor lamp treatment | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Phototherapy: sleep regulation | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Phototherapy of skin | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Visible light therapy NOS | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Photodynamic therapy of skin of whole body | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Photochemotherapy | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Visible light therapy | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Endoscopic retrograde photodynamic laser therapy of lesion of bile duct | Using energy | True | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 2 | 
| Photochemotherapy with psoralens and ultraviolet A | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 2 | 
| Kromayer treatment | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Photochemotherapy with tar and ultraviolet B | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 | 
| Phototherapy of newborn | Using energy | False | Light, electromagnetic radiation | Inferred relationship | Existential restriction modifier | 1 |