Marvel.com says Sue Storm has a power to bend all wavelengths of light and this way she becomes invisible.
Sue can render herself wholly or partially invisible at will. She can also render other people or objects invisible, affecting up to forty thousand cubic feet of volume.
She achieves these feats by mentally bending all wavelengths of light in the vicinity around herself or the target in question, and she somehow does this without causing any visible distortion effects; she also somehow directs enough undistorted light to her eyes to retain her full range of vision while invisible. - Source
The quote above also says she somehow does this without losing her eyesight.
Are there any references in the comics that explain how she does this? Or did they just jump into the story without giving somehow logical answer to that?