| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Cross syndrome | Is a | False | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Dysplasia of eye | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmos associated with other anomalies of eye AND/OR adnexa | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Hypoplasia of eye | Is a | False | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Simple microphthalmos | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmos, unspecified | Is a | False | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Unspecified microphthalmos NOS | Is a | False | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmos with other eye anomaly | Is a | False | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmos NOS | Is a | False | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Lenz microphthalmia syndrome | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microcephaly, microphthalmia, ectrodactyly of lower limbs and prognathism syndrome | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmos co-occurrent with congenital ocular coloboma | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Oculocerebral dysplasia syndrome | Is a | False | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Nanophthalmia | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmia with ankyloblepharon and intellectual disability syndrome | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Syndromic microphthalmia due to orthodenticle homeobox 2 mutation | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmia with brain atrophy syndrome | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Arrhinia with choanal atresia and microphthalmia syndrome | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmia with linear skin defect syndrome | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Macrosomia, microphthalmia, cleft palate syndrome | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Frontonasal dysplasia, severe microphthalmia, severe facial clefting syndrome | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmia, retinitis pigmentosa, foveoschisis, optic disc drusen syndrome | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmos of right eye | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmos of left eye | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmos due to branchio-oculo-facial syndrome | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmos due to Fryns syndrome | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmos due to Delleman syndrome | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Syndromic nanophthalmos due to Kenny-Caffey syndrome | Is a | True | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Lenz microphthalmia syndrome | Is a | False | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Unspecified microphthalmos NOS | Is a | False | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmos, unspecified | Is a | False | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmos NOS | Is a | False | Microphthalmos | Inferred relationship | Existential restriction modifier |  | 
| Microphthalmos with other eye anomaly | Is a | False | Microphthalmos | Inferred relationship | Existential restriction modifier |  |