| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values | 
| Peripheral pterygium, progressive | Is a | Pterygium | false | Inferred relationship | Existential restriction modifier |  |  | 
| Peripheral pterygium, progressive | Associated morphology | Degeneration | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Peripheral pterygium, progressive | Associated morphology | Hypertrophy | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Peripheral pterygium, progressive | Finding site | Corneal structure | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Peripheral pterygium, progressive | Finding site | Conjunctival structure | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Peripheral pterygium, progressive | Finding site | Conjunctival structure | true | Inferred relationship | Existential restriction modifier | 4 |  | 
| Peripheral pterygium, progressive | Finding site | Corneal structure | true | Inferred relationship | Existential restriction modifier | 3 |  | 
| Peripheral pterygium, progressive | Associated morphology | Hypertrophy | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Peripheral pterygium, progressive | Associated morphology | Degeneration | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Peripheral pterygium, progressive | Associated morphology | Proliferative mass | true | Inferred relationship | Existential restriction modifier | 3 |  | 
| Peripheral pterygium, progressive | Associated morphology | Elastoid degeneration | true | Inferred relationship | Existential restriction modifier | 4 |  | 
| Peripheral pterygium, progressive | Is a | Peripheral pterygium | true | Inferred relationship | Existential restriction modifier |  |  | 
| Peripheral pterygium, progressive | Is a | Chronic disease of ocular adnexa | true | Inferred relationship | Existential restriction modifier |  |  | 
| Peripheral pterygium, progressive | Clinical course | Progressive | true | Inferred relationship | Existential restriction modifier | 2 |  |