1. Humidity chamber : the chamber can be used to simulate environmental
conditions (optional), in
addition to humidity and
temperature (optional)
2. Actuation : translational
motion allows for model
eyelid to move vertically
against the model eyeball
3. Eyelid holder : the holder
secures the eyelid during
blinking
4. Model eyelid : the eyelid
glides over the eyeball
surface with each blink to
evenly spread tear fluid