| Code Value |
Definition |
| BEARD | Having beard |
| BLINK | Blinking (either or both eyes closed) |
| CLEAR GLASSES | Subject wearing clear glasses |
| DARK GLASSES | Subject wearing dark or visible colored glasses (medical) |
| DISTORTING CONDITION | Having distorting medical condition impacting feature point detection |
| EYES AWAY | Looking away from the camera |
| FROWNING | Frowning |
| HAT | Head covering/hat |
| LEFT EYE PATCH | Subject wearing left eye patch |
| MOUSTACHE | Having mustache |
| MOUTH OPEN | Subject having mouth open |
| NEUTRAL | Neutral (non-smiling) with both eyes open and mouth closed |
| NO EAR | Ear(s) obscured by hair |
| RAISED BROWS | Raising eyebrows |
| RIGHT EYE PATCH | Subject wearing right eye patch |
| SCARF | Wearing scarf |
| SMILE | Smiling where the inside of the mouth and/or teeth is not exposed (closed jaw) |
| SQUINTING | Squinting |
| TEETH VISIBLE | Having teeth visible |
| UNKNOWN | Expression unspecified |