A driver waiting at the traffic lights goes blind.
No food, no.
And when fire destroys the asylum, the inmates burst forth and the last links with a supposedly civilised society are snapped.
Trying to stem the epidemic, the authorities herd the afflicted into a mental asylum where the wards are terrorised by blind thugs.
It becomes a contagion, spreading throughout the city.
An ophthalmologist tries to diagnose his distinctive white blindness, but is affected before he can read the textbooks.
A driver waiting at the traffic lights goes blind