dim-sighted, eyes not seeing clearly
眊 centers on impaired vision: eyes that are dim, unclear, or not seeing sharply. The given meanings describe a state of poor eyesight rather than complete blindness.
眊 combines 目 (eye) with 毛, which likely contributes the sound and may suggest a hazy or blurred quality like a thin film over the eye. The exact historical development is uncertain.
The eye 目 is covered by a thin layer of hair 毛, making everything look dim and unclear.
For ボウ, imagine a dim-sighted person squinting at a bow: bow -> ボウ, and the blurry shape of the bow is all they can see.