part_of full retina thickness retinal inner layer thickness 2019-03-19T16:16:29Z CMO:0003084 PMID:25361751 The inner retinal thickness is defined as straight lines between outer plexiform layer to the vitreous perpendicular to the retinal layer measured. The measurement usually is done by optical coherence tomography (OCT). VT:0003727 clinical_measurement_ontology sjwang