Living with blind cats

All but blind
In his cambered hole
Gropes for worms
The four-clawed Mole.

All but blind
In the evening sky
The hooded Bat
Twirls softly by.

All but blind
In the burning day
The Barn-Owl blunders
On her way.

And blind as are
These three to me,
So blind to someone
I must be.

(Walter de la Mare)

A disturbing but enlightening link ..
http://www.our-happy-cat.com/blind-cats.html