optical

Meanings

1. 1
   adj

   Relating to sight or the eyes.

   She went to the optical shop to order new glasses.

2. 2
   adj

   Relating to light, or designed to work with light.

   A microscope is an optical instrument.

3. 3
   adj

   Using devices that detect or respond to light.

   The door opens automatically thanks to an optical sensor.

From optic + -al.

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