Pupil Size Difference
| Status | No Existing Standards |
| Category | Pupils |
| Common Name | Pupil Size Difference |
| Label | None |
| Description | Difference between the sizes of the right and left pupils |
| Background | If the pupils are different sizes this is an indicator of the Marcus Gunn sign which indicates a problem with the optic nerve or the retina. |
| Devices | NPI-200 Pupillometer |
| Units | mm |
| Metadata | Eye (Right/Left) |