Modified blink dynamic index predicts activity and severity in patient with facial nerve palsy

Purpose We analyzed the dynamics of blink and defined index in facial nerve palsy (FNP) patients using an ocular surface interferometer associated with clinical characteristics progress. Methods In total, 49 were enrolled this study. All tested which is used to measure patterns (total (TB), partial rate (PBR)) (blink time (BT), lid closing (LCT), closure (CT), opening (LOT), interblink (IBT), speed (CS), (OS)) 600 frames recorded over 20 s. The distance lagophthalmos modified interpalpebral fissure (IPF), was as actual moving upper eyelid, subtracting from IPF, measured ImageJ program. types FNP “idiopathic” (Bell’s palsy) “surgical” (following neurosurgery). Patients classified into “acute” “chronic” based on duration 6 months onset FNP. mild or severe according degree exposure keratopathy—as “severe” if treatment such tarsorrhaphy gold plate insertion required. Results Reduced MRD 1 , brow height, IPF increased noted side. LCT longer CS, OS shorter CS idiopathic acute clinically severe. IBT Conclusion Analyzing dynamics, study suggests meaningful indicators among profiles LCT, IPF. It more type than surgical patients. can be a useful tool for evaluating activity severity indicator