角膜

1. Origins, structure, and basic meaning

• Structure: 角膜 is read as かくまく and is the medical noun for the cornea, a part of the eye.
• Basic usage: Checking the cornea for injury appears in 角膜に傷がないか調べる, while learning its location from a model appears in 角膜が目のどこにあるか学ぶ.

2. Common pitfalls and similar expressions

• Particles for location and state
  • A corneal injury appears in 角膜に傷がある, while a question about the cornea's own location appears as 角膜がどこにあるか.