I personally find the use of
rabbits to test cosmetics to be very sad
for the rabbit. These tests are gradually being replaced with more humane tests. But for a long time it was a necessary evil.
But getting back to your little guy, I recommend that you take him to a vet and have diagnostics performed, because conjunctivitis and corneal ulcers can be painful, and if an ear infection is possible it can spread to the middle ear and cause neurological problems.