'intraocular' originates from Latin elements: the prefix 'intra-' meaning 'within' and Latin 'oculus' meaning 'eye', combined into the English adjective.

'intraocular' developed by joining the Latin prefix 'intra-' with the Late Latin/Medieval Latin-derived adjective 'ocular' (from Latin 'oculus'), forming the compound used in modern English.

Initially and historically it has meant 'within the eye' and this core meaning has been maintained in modern medical usage.