The physician's voice became gentler. "We know so little about mutants.
Fifty thousand of them in the world, perhaps--born too early or too
late! An inward vision that can pierce the barriers of sense and see to
the heart of things. And an outward vision that's defective, faltering,
almost a blind man's vision. Clairvoyance and failing sight--it just
doesn't make sense."
"Joan makes sense," Langford said. "If she were stone blind I'd still
worship her."
Dr. Crendon held his hands straight out before him and looked down
at them. "I did my best," he said, simply. "There were slight
peculiarities of structure in the choroid but I'm sure that the new
cornea will adjust. It's the retina itself, the innermost nervous tunic
of the eye, that I'm worried about."
He paused, then went on quickly: "A mutant's retina is hypersensitive.
It responds to light in a peculiar way and has a tendency to distort
images. But that distortion vanishes when the mind becomes really
active."