Upper and lower eyelid saccades describe a harmonic oscillator function.

@article{Malbouisson2005UpperAL,
  title={Upper and lower eyelid saccades describe a harmonic oscillator function.},
  author={Jorge Mario C Malbouisson and Antonio Augusto Velasco E Cruz and Andre Messias and L{\'i}vio Viana de Oliveira Leite and Gilmasa D Rios},
  journal={Investigative ophthalmology & visual science},
  year={2005},
  volume={46 3},
  pages={857-62}
}
PURPOSE To determine whether experimentally measured upper and lower eyelid saccades can be fitted to a mathematical function. METHODS A charge-coupled device video camera connected to a personal computer was used to record upper and lower eyelid saccades accompanying 20 degrees and 40 degrees of vertical eye rotation in 19 normal adult subjects. Movement analysis was performed with software that calculated the center of a blue spot in each frame. The damped harmonic oscillator model was used… CONTINUE READING

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