Noninvasive measurement of eye retraction during blinking.
We present a noninvasive technique for high-speed measuring of eye retraction and eyelid position during blinking. The anterior chamber of the eye is illuminated by the slit lamp of a biomicroscope and eye dynamics during a blinking sequence are captured with a high-speed camera working at 500 frames per second. Digital image processing allows quantitative analysis of cornea and eyelid positions during the closing and opening phases of the blinking process. Our method allows simultaneous measuring of corneal retraction, duration of down and up phases, total blinking duration, and average and peak speeds of the eyelids in both phases, thus providing a complete analysis of the blink's transversal motions.
Instituto de Física Aplicada a las Ciencias y Tecnologías, Universidad de Alicante, PO Box 99, 03080 Alicante, Spain. david.mas@ua.es
David
D
Mas
Begoña
B
Domenech
Julián
J
Espinosa
Jorge
J
Pérez
Consuelo
C
Hernández
Carlos
C
Illueca
D001767:Blinking / Q000502:physiology*; D003315:Cornea / Q000033:anatomy & histology* / Q000502:physiology*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005133:Eye Movements / Q000502:physiology; D006801:Humans; D008029:Lighting / Q000295:instrumentation*; D008853:Microscopy / Q000295:instrumentation*; D010781:Photography / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D014741:Video Recording / Q000295:instrumentation