What is Leber congenital amaurosis?
A type of deafness.
A type of blindness.
A type of limb deformity.

	How did scientists reverse the condition in dogs?
They introduced a healthy version of a gene into the dogs' retinas.
They introduced a damaged version of a gene into the dogs' retinas.
They closed their eyes and wished really hard.

	Do you think this research is important?
Yes.
No.
Not Sure.