Set in the aftermath of a comet shower that blinds most of the world's population, those with sight must battle alien plants, known as Triffids, bent on destroying mankind.
a modified formulation from deadline.com on February 29, 2012
When a shower of meteorites lights up the sky, it creates such a gorgeous sight that most earthlings can't help but look. 99% of the population goes blind as a result, but matters grow worse the meteorites unleash Triffids, plants capable of moving around so they can better attack the blind.
from deadline.com on October 21, 2010
Mankind suffers a global crisis due to the presence of plants capable of aggressive behavior, leading to an unprecedented cosmic event causing global blindness.
from variety.com on September 23, 2010