Using Eye Aspect Ratio to Enhance Fast and Objective Assessment of Facial Paralysis

Table 1

Facial nerve grading scale 2.0.

Score	Region
	Brow	Eye	NLF	Oral
1	Normal	Normal	Normal	Normal
2	Slight weakness >75% of normal	Slight weakness >75% of normal, Complete closure with mild effort	Slight weakness >75% of normal	Slight weakness >75% of normal
3	Obvious weakness >50% of normal, Resting symmetry	Obvious weakness >50% of normal, Complete closure with maximal effort	Obvious weakness >50% of normal, Resting symmetry	Obvious weakness >50% of normal, Resting symmetry
4	Asymmetry at rest <50% of normal, Cannot close completely	Asymmetry at rest <50% of normal	Asymmetry at rest <50% of normal	Asymmetry at rest <50% of normal
5	Trace movement	Trace movement	Trace movement	Trace movement
6	No movement	No movement	No movement	No movement
Secondary movement (global assessment)
Score	Degree of movement
0	None
1	Slight synkinesis; minimal contracture
2	Obvious synkinesis; mild to moderate contracture
3	Disfiguring synkinesis; severe contracture
Reporting: sum scores for each region and secondary movement
Grade	Total score
I	4
II	5–9
III	10–14
IV	15–19
V	20–23
VI	24

NLF, nasolabial fold.