| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Fusion with defective stereopsis | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Severe myopia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: one eye: moderate impairment: other eye: near-normal vision | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Strabismic amblyopia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: profound impairment of both eyes | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: low vision of one eye | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Transient visual loss | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Hypermetropia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: near-total impairment of both eyes | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Disorder of refraction | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Central blindness | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Colour vision deficiency | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: better eye: severe impairment: lesser eye: not further specified | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Presbyopia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Metamorphopsia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: one eye: near-total impairment: other eye: not specified | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: better eye: moderate impairment: lesser eye: near-total impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: one eye: profound impairment: other eye: not specified | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Irregular astigmatism | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Xanthopsia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Monocular diplopia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Abnormal dark adaptation curve | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Protan defect | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Tritan defect | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Concentric fading of visual field | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Acquired night blindness | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Disorder of accommodation | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Photopsia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Achromatopsia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Myopia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: better eye: severe impairment: lesser eye: total impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: one eye: profound impairment: other eye: normal vision | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Visual disturbance | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: better eye: moderate impairment: lesser eye: not further specified | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: better eye: profound impairment: lesser eye: not further specified | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Night blindness | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Legal blindness | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Cycloplegia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level of both eyes | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Regular astigmatism | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Visual distortions of shape AND/OR size | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Psychophysical visual disturbance | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Amaurosis | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: low vision of both eyes | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Alcoholic amblyopia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Toxic disorder of refraction AND/OR accommodation | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Acquired colour vision deficiency | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: one eye: severe impairment: other eye: near-normal vision | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Disorder of refraction AND/OR accommodation | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Refraction | Is a | True | Vision observable | Inferred relationship | Some |  | 
| Impairment level: better eye: near-total impairment: lesser eye: total impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: one eye: severe impairment: other eye: normal vision | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: moderate impairment of both eyes | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Refractive diplopia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Drug-induced disorder of refraction AND/OR accommodation | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Strachan's syndrome | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Deutan defect | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: better eye: profound impairment: lesser eye: near-total impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: one eye: total impairment: other eye: normal vision | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Subjective visual disturbance | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: better eye: moderate impairment: lesser eye: total impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Abnormal retinal correspondence | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Transient refractive change | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: one eye: profound impairment: other eye: near-normal vision | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Astigmatism | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Binocular vision disorder | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Anton's syndrome | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Visual halos | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Transient blindness | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Topographical agnosia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| AIDS with blindness | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Tritanopia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Erythropsia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Total internal ophthalmoplegia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: severe impairment of both eyes | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Amaurosis fugax | Interprets | False | Vision observable | Inferred relationship | Some | 2 | 
| Simultaneous visual perception without fusion | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: total impairment of both eyes | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Refractive amblyopia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Impairment level: blindness, one eye - low vision other eye | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Refractive polyopia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Congenital blindness | Interprets | False | Vision observable | Inferred relationship | Some | 3 | 
| Disorder of vision | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Toxic amblyopia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Malignant myopia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Anisometropia and aniseikonia | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Binocular vision suppression | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Both eyes total visual impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Better eye: near total visual impairment, Lesser eye: total visual impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Better eye: near total visual impairment, Lesser eye: near total visual impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Better eye: profound visual impairment, Lesser eye: total visual impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Better eye: profound visual impairment, Lesser eye: near total visual impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Better eye: profound visual impairment, Lesser eye: profound visual impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Better eye: low vision, Lesser eye: profound visual impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| One eye blind, one eye low vision | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Better eye: severe visual impairment, Lesser eye: total visual impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Better eye: severe visual impairment, Lesser eye: near total visual impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Better eye: severe visual impairment, Lesser eye: profound visual impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Better eye: moderate visual impairment, Lesser eye: total visual impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Better eye: moderate visual impairment, Lesser eye: near total visual impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 | 
| Better eye: moderate visual impairment, Lesser eye: profound visual impairment | Interprets | False | Vision observable | Inferred relationship | Some | 1 |