Walleye: 1. Divergent strabismus (exotropia) in which the eye turns outward away from the nose. 2. A dense white opacity (leukoma) of the cornea. 3. Large staring eyes, like those of certain fish such as the pike.
All of these meanings relate to the walleyed pike, a freshwater perch. When the walleyed pike is dead, its large divergent eyes quickly become opaquely white. From the Old Norse "vagl-eygr," from "vagl" (beam) and "eygr" (eyed).