Definition

1. Noun (Zoology):

   • A large, predatory freshwater fish (Sander vitreus, formerly Stizostedion vitreum) native to North America. It is a type of perch characterized by its large, glassy-looking eyes that reflect light, which aid its vision in dark or murky water. It is also known as the walleyed pike.

2. Noun (Medicine/Ophthalmology):

   • A condition of strabismus (misalignment of the eyes) where one or both eyes are turned outward, away from the nose. This is also called exotropia. The term can also refer to an eye with a pale iris or opaque cornea that gives it a whitish appearance.

Usage Examples

• Noun (Fish):

  • Anglers prize the walleye for its firm, white flesh and challenging catch.
  • The walleye gets its name from its distinctive, light-reflecting eyes.

• Noun (Eye Condition):

  • The child's walleye was corrected with prescription glasses and vision therapy.
  • In some breeds of dogs, a walleye (a blue or white eye) is a standard trait.

Advanced Usage

• The term is often used attributively (like an adjective) to describe things related to the fish, e.g., walleye fishing, walleye tournament.
• In medical contexts, "walleye" is a layman's term; the formal clinical term is exotropia.

Variants and Related Words

• Walleyed (adjective): Having walleye (the eye condition); or, having eyes like a walleye fish (large and glassy).
  • The walleyed patient was referred to a specialist.
  • He stared at the scene with a walleyed expression of shock.
• Walleyed pike: Another common name for the walleye fish.

Synonyms

• For the fish: Walleyed pike, yellow pike, pickerel (note: "pickerel" can cause confusion with other species).
• For the condition: Exotropia, divergent strabismus.

Related Phrases

• To have a walleye: To suffer from exotropia.
  • As a baby, he appeared to have a walleye, but it corrected itself.
• Walleye vision: Colloquially, excellent night vision or the ability to see well in low light, akin to the fish's adaptation.
  • The night watchman was said to have walleye vision.

Noun

1. pike-like freshwater perches
2. strabismus in which one or both eyes are directed outward