obsolete_global developmental delay - neuro-ophthalmological abnormalities - seizures - intellectual disability syndrome true 3.41.0 A form of mental retardation, a disorder characterized by significantly below average general intellectual functioning associated with impairments in adaptive behavior and manifested during the developmental period. MRD55 patients suffer from seizures appearing during the first years of life. OMIM:617831 Replaced with Mondo term. http://purl.obolibrary.org/obo/MONDO_0024252