Reliability analysis of the eye-system using simulation.
To "go blind" with respect to the ability to drive, ... you might lose eyesight gradually (degenerative with age) or ... you might have your eyes poked out.
But eyes get poked out one at a time, as a catastrophic event.
Time until left eye is poked out can be modelled with an exponential rv
Time until right eye is poked out can be modelled with an exponential rv
Time until your eyes degenerate to blindness can be modelled with ... some distribution. Let's assume that a normal distribution is reasonable.