optical

Related to light or the way we see things.

• The drawing creates an optical illusion.
• Optical telescopes collect light from distant stars.
• The cable carries optical signals.

Common phrases: optical illusion, optical signal

Made to help you see things more clearly or in greater detail.

• A microscope is an optical instrument.
• She uses optical aids to read small print.
• These optical lenses make distant objects look closer.

Common phrases: optical instrument, optical aid

Using parts that detect light to make a device work.

• An optical sensor detects passing cars.
• My optical mouse works well on this desk.
• The door has an optical switch.

Common phrases: optical mouse, optical sensor