I don't know how many, but rabbits are often blinded due to testing. Cosmetics and other products are put in rabbit's eyes to test how it reacts. After this, they are killed. Other animals are probably blinded in testing too.
There are many side-effects to testing in animals such as permanent brain damage, cancer, and even death.
They use their eyes, but many are blind or very nearly blind.
Approximately 12 .1 million animals are used a year for testing.
He got blind when he watched the sun with his telescope for many days
There are many reasons why people use animals for testing. One reason is that they don't want to risk killing a human.
In Washington state from 2007 to 2008, roughly 1850 animals died due to animal testing :(
There is about 17,000
No, not all laundry detergent undergoes testing on animals before being approved for sale. Many companies use alternative testing methods that do not involve animals.
In the U.k. 1,373,400 a year
over 100
I have no clue.
why do you think many animals and plants did not become fossils