retinal outer layer thickness photoreceptor inner segment layer thickness 2021-03-08T16:33:15Z CMO:0003669 PMID:21993171 PMID:24210432 PR IS This is a measurement of the inner segment of the retinal photoreceptor layer. The inner segment of the photoreceptor connects the outer segment and synapse and is filled with organelles such as the ER, Golgi, and mitochondria, where much of metabolism and regulation of membrane potential takes place. VT:0001325 clinical_measurement_ontology slaulede