Bifocals and Optics

Bifocals noun - Eyeglasses having two focal lengths, one for near vision and the other for far vision.

Optics and bifocals are semantically related. In some cases you can use "Optics" instead a noun "Bifocals".

Optics noun - The branch of physics that studies the physical properties of light.

Bifocals and optics are semantically related. Sometimes you can use "Bifocals" instead a noun "Optics".

Nearby Words: optic, optical, optically, optician