Characterisation of blink dynamics using a high-speed infrared imaging system.
blink speed
eyelids
image analysis
infrared imaging
non-invasive
spontaneous blinking
Journal
Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)
ISSN: 1475-1313
Titre abrégé: Ophthalmic Physiol Opt
Pays: England
ID NLM: 8208839
Informations de publication
Date de publication:
07 2020
07 2020
Historique:
received:
03
02
2020
accepted:
22
04
2020
pubmed:
27
5
2020
medline:
22
7
2021
entrez:
27
5
2020
Statut:
ppublish
Résumé
Development and validation of a non-invasive imaging system to capture spontaneous blinking and characterise blink dynamics using a custom image analysis algorithm. A pilot study investigated the influence of illumination type on blink dynamics. Spontaneous blinking was recorded in eight subjects using a high-speed camera under two illumination conditions: white light and infrared. Custom semi-automated software assessed palpebral aperture height (PAH), blink rate, blink speed, blink completeness and blink duration. The main clinical study compared two different image analysis techniques. Spontaneous blinking was recorded in 20 subjects using a high-speed infrared camera. Blink speed and duration were determined using two techniques: manual tracking and semi-automated tracking. Agreement between the two techniques was assessed using Bland-Altman analysis. Coefficients of repeatability (COR) were calculated for the semi-automated technique. There were significant differences between white light and infrared illumination for PAH (p < 0.0001), blink rate (p = 0.04), closing speed (p = 0.009), opening speed (p < 0.0001) and blink duration (p = 0.0003). The mean differences (95% limits of agreement) between the two techniques were 0.6 mm s This study has shown that spontaneous blinking can be characterised using a non-invasive imaging system. The semi-automated analysis provides a rapid characterisation of blink dynamics, allowing its application in large-scale trials in a number of clinical areas.
Types de publication
Comparative Study
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
519-528Informations de copyright
© 2020 The Authors Ophthalmic & Physiological Optics © 2020 The College of Optometrists.
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