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World 6 · Eye & Ear · 8 min · PRO

Focus a near object

Accommodation and the near point

PRO · Light & Optics

World 6: Eye & Ear is part of PRO

The first world of Light & Optics is free. PRO opens the other 43 lessons in 5 worlds — simulations, quizzes and all.

  • Correct a myopic eye
  • Where 1 kHz lands
  • Why high tones go first
PRO includes
  • All 26 labs — every world, every lesson
  • Practice exams and certificates

$8.33/mo, billed yearly ($99.99) · or $39.99 monthly

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