She always has an optimistic outlook on life.

The optimum temperature for this experiment is 25 degrees Celsius.

An air conditioner is available as an optional extra.

Fiber optics is used in telecommunications to transmit data at high speeds.

The local option allows residents to vote on whether or not to allow the sale of alcoholic beverages.

He went to the optician to get his eyes checked.

Optical art, also known as op art, is a style of visual art that uses optical illusions.

I used an optical scanner to digitize the documents.

Optics is the branch of physics that studies the behavior and properties of light.

She is an optimist who always sees the bright side of things.