Just to add on for others reading your comment: Although metals are opaque, conductors can still be transparent. A few techniques:

- Very thin layers (like graphene) such that absorption is on the order of a percent

- Narrow bandwidth materials that are opaque to infrared but transparent to visible

- Bad metals and non-band conductors that have correlated electron hopping from site to site

Transparent conductors like ITO are critical materials for displays and solar cells, since light needs to enter/exit one side of the device.