266 
A TREATISE ON ELEPHANTS. 
is an opalescence or haziness of the pupil replacing the jet black 
normal appearance. They generally develop slowly (months or even 
years) but when due to severe blows or injuries of the eye may 
appear in a few days. They tend to culminate in complete 
blindness. As a rule the cornea is quite clear, but should there be 
opacity, it is independent of the cataract. 
Treatment. — Nil. 
