I need to order some optical flats for the experiment.

There are many optical doubles in the night sky.

The optic chiasms are responsible for the crossing of optic nerve fibers.

The optical axes of the two lenses are aligned.

Optical activities can be observed in certain crystals.

The optical rotations of the compounds were measured using a polarimeter.

The ophthalmologist examined the patient's optic discs.

Optical fibres are used to transmit data at high speeds.

The doctor examined the patient's optic disks.

Optical traps are used in scientific research to manipulate and study microscopic particles.