Blinking of eyes is a reflex action.
Voluntary action
Blinking of eyes is not a reflex action, but it is an involuntary action. A reflex action is one which occurs spontaneously whereas involuntary action happens without the conscious control or will of an organism. The way the iris in our eye adjusts the size of the pupil in response to sudden bright or dim light is a reflex action. But blinking of eyes is an involuntary action.