The skin is acknowledging light, we know this.
Now say the skin inverted itself and can now tell which way the light was coming from, and can steer itself.
Now say we invert it even more! It can now tell where it is, and where more appropriatley the light is coming from, this species would ultimately tell
more where the light is coming from.
Now more inverted we can tell where the light is pin pointed and can make out vague images.
The cells excrete mucos, collects into a blodge, and lodges into the pinhole acquiring it into make a pinhole image!
Now skin over the eye and harder, now it can focus through the skin, and hold a greater focus and resolution!
And Richard Dawkins, has the audacity to even tell you of the species this can be done in!