During the examination, the ophthalmologist noted slight pallor of the optic disc, suggesting early ganglion cell axon loss at the point where they exit the eye to form the optic nerve.

The ophthalmologist examined the patient's optic discs for signs of glaucoma.

After cleaning the optical disc, she carefully placed it back into its protective case to prevent scratches.

The museum's collection includes rare optical discs from the early 2000s, each labeled with handwritten notes.

She installed the new optical disc drive to play archival CDs and DVDs on her desktop.

After we upgraded the servers, the lab still had several optical disc drives for legacy backups.