Wand/pointer Used to Interact With Screen

This page is the CodyCross answer for the clue below from Space Exploration, Group 902, Puzzle 5 (Lunar Eclipse).

Question is: Wand/pointer Used to Interact With Screen

and the answer is: LIGHTPEN

Word Meaning:

LIGHT PEN — (computer hardware) A pen-like device allowing a computer user to interact with the screen display.

Definitions from Wiktionary.