# Eye

## Choroid

Both *subchoroidal* and *suprachoroidal* refer to the same potential anatomic space between the choroid and the sclera. The term *lamina subchoroidea of choroid* is the same as the *lamina suprachoroidea*.

{% hint style="warning" %}
In the literature, the term *massive suprachoroidal hemorrhage* is replacing *expulsive hemorrhage* and *subchoroidal hemorrhage*.
{% endhint %}

## Retinal vein

There is not a vein actually named *retinal vein*. However, *SNOMED CT* has concepts with the phrase.

For example,

* 85003000 |Structure of retinal vein (body structure)| has the synonym *retinal vein*.
  * 280927000 |Entire central vein of the retina (body structure)| has the synonym *entire central retinal vein.*

## Orbital region

371398005 |Eye region structure (body structure)| has a synonym of *orbital region structure* which subsumes *bony orbit*, *entire* *eye*, and *ocular adnexa*.

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