| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Rigid contact lens | Is a | True | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Flexible contact lens | Is a | True | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Gas-permeable contact lens | Is a | True | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Acrylic contact lens | Is a | True | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Hydrophilic contact lens | Is a | True | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Non-hydrophilic contact lens | Is a | True | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Scleral contact lens | Is a | True | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Corneoscleral contact lens | Is a | True | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Corneal contact lens | Is a | True | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Provision of scleral contact lens | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Provision of corneoscleral contact lens | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Provision of corneal contact lens | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Prescribing corneal contact lens | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Prescribing corneal contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Replacement of contact lens | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Replacement of contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescription, fitting and dispensing of contact lens | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Prescription, fitting and dispensing of contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Prescribing, fitting and revision of contact lens | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Prescribing, fitting and revision of contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescribing contact lens for aphakia, unilateral | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Prescribing contact lens for aphakia, unilateral | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescribing, fitting and revision of corneoscleral contact lens | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Modification of contact lens | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Modification of contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescribing contact lens for aphakia, bilateral | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Prescribing contact lens for aphakia, bilateral | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Corneal edema caused by wearing of contact lenses | Causative agent | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Prescribing corneoscleral contact lens | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Prescribing contact lens for aphakia | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Prescribing contact lens for aphakia | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Contact lens-induced corneal fluorescein staining | Causative agent | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Contact lens care | Direct device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Bifocal contact lens | Is a | True | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Contact lens overwear syndrome | Causative agent | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Contact lens related disorder | Associated with | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Contact lens related corneal infiltrate | Associated with | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Giant papillary conjunctivitis caused by contact lens | Associated with | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Contact lens related red eye | Associated with | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Contact lens related sterile keratitis | Associated with | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Contact lens related corneal abrasion | Associated with | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Provision of scleral contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Provision of corneoscleral contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Provision of corneal contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Prescribing, fitting and revision of corneoscleral contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescribing corneoscleral contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Orthokeratology | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Contact lens assisted pharmacologically induced keratosteepening | Using | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Bandage contact lens | Is a | True | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Contact lens related conjunctivitis | Associated with | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Extended - wear contact lens | Is a | True | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Collagen corneal shield | Is a | True | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Contact lens related papillary conjunctivitis | Associated with | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 3 | 
| Contact lens assisted pharmacologically induced keratosteepening | Indirect device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Provision of scleral contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 3 | 
| Provision of scleral contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 4 | 
| Provision of corneoscleral contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 4 | 
| Provision of corneoscleral contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 3 | 
| Provision of corneal contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 3 | 
| Provision of corneal contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 4 | 
| Prescribing, fitting and revision of corneoscleral contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescribing, fitting and revision of corneoscleral contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 4 | 
| Prescribing corneoscleral contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 3 | 
| Prescribing corneoscleral contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 4 | 
| Orthokeratology | Direct device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 3 | 
| Orthokeratology | Direct device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Orthokeratology | Direct device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescribing corneal contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 4 | 
| Prescribing corneal contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Prescribing corneal contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 3 | 
| Replacement of contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 3 | 
| Replacement of contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Replacement of contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 4 | 
| Prescription, fitting and dispensing of contact lens | Direct device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescription, fitting and dispensing of contact lens | Direct device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 3 | 
| Prescription, fitting and dispensing of contact lens | Direct device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Prescribing, fitting and revision of contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 3 | 
| Prescribing, fitting and revision of contact lens | Direct device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescribing, fitting and revision of contact lens | Direct device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Prescribing contact lens for aphakia, unilateral | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 4 | 
| Prescribing contact lens for aphakia, unilateral | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Prescribing contact lens for aphakia, unilateral | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Modification of contact lens | Direct device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Modification of contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 3 | 
| Modification of contact lens | Direct device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescribing contact lens for aphakia, bilateral | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Prescribing contact lens for aphakia, bilateral | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescribing contact lens for aphakia, bilateral | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 4 | 
| Prescribing contact lens for aphakia | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Prescribing contact lens for aphakia | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 4 | 
| Prescribing contact lens for aphakia | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescribing, fitting and revision of corneoscleral contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Replacement of contact lens | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescribing contact lens for aphakia | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescribing contact lens for aphakia, unilateral | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Prescribing contact lens for aphakia, bilateral | Direct device | False | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Replacement of contact lens | Direct device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Contact lens assisted pharmacologically induced keratosteepening | Indirect device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 | 
| Contact lens submitted as specimen | Specimen source identity | False | Contact lenses, device | Inferred relationship | Existential restriction modifier |  | 
| Disorder of cornea associated with contact lens | Associated with | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 2 | 
| Fitting of contact lens | Direct device | True | Contact lenses, device | Inferred relationship | Existential restriction modifier | 1 |