Meniscus and Spectacles

Meniscus noun - (optics) a lens that is concave on one side and convex on the other.

Spectacles and meniscus are semantically related. in glass for vision topic. In some cases you can use "Spectacles" instead a noun "Meniscus".

Spectacles noun - Optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision.

Meniscus and spectacles are semantically related. Sometimes you can use "Meniscus" instead a noun "Spectacles".