They appear dark to almost opaque when viewed under an optical microscope.

With the optical microscope, the lenses are designed for the optics of the eye.

Most viruses are too small to be seen directly with an optical microscope.

Using an optical microscope the area that the bead moves in was detected.

Individual atomic planes were then hunted with an optical microscope.

He also added an optical microscope to view the point of beam impact.

This setup is similar to a standard optical microscope.

For information about stereo microscopes with a digital camera in research and development see optical microscope.

They continue to fall in price, especially compared with traditional optical microscopes.

It refers in general to the study of cellular structures that are too small to be seen with an optical microscope.