What does retrobulbar mean?
Retrobulbar is a medical adjective describing something located behind the eyeball. It most often refers to the retrobulbar space, a region between the back of the eyeball and the tissues of the eye socket, or to structures occupying that space. The term appears in clinical procedures such as retrobulbar injections and retrobulbar blocks, which place medication or anaesthetic in the tissues behind the eye rather than inside the eyeball. It can also describe conditions affecting this area, including inflammation, haemorrhage, or tumours. Because the word refers to a relatively specific anatomical location, it is most common in ophthalmology, radiology, and anaesthesia. Though its anatomical meaning is technical, retrobulbar is readily understood once “retro,” meaning backward, and “bulbar,” meaning relating to a bulb such as the eye, are recognised.
adjectiveSituated behind the eyeball, especially within the space or tissues behind the globe of the eye.
- Located behind the eyeball or relating to the space and tissues behind the globe of the eye.
"The surgeon administered a retrobulbar injection before performing the ophthalmic procedure."
"A retrobulbar injection delivers medication into the tissues behind the eye."
"The scan revealed a retrobulbar hemorrhage that was compressing the optic nerve."
Retrobulbar is a medical word for the hidden space behind the eye—where an injection can reach without passing through the eyeball itself.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does retrobulbar come from?
Retrobulbar was formed within English from the Latin-derived prefix retro-, meaning backward or behind, and bulbar, an adjective meaning relating to a bulb or the eyeball. The latter comes through French from Latin bulbus, meaning bulb. The combined term explicitly identifies a location behind the bulb of the eye.
How retrobulbar is actually used
This is a specialist medical term, used chiefly in ophthalmology and anaesthesia. In British medical usage, it is also encountered in expressions such as retrobulbar anaesthesia.
Easily confused with retrobulbar
Retrobulbar specifically means behind the eyeball, whereas retro-orbital refers more broadly to the area behind the eye socket.