Lens maker and Trained worker

Lens maker noun - A worker who makes glasses for remedying defects of vision.

Trained worker and lens maker are semantically related. In some cases you can use "Trained worker" instead a noun phrase "Lens maker".

Trained worker noun - A worker who has acquired special skills.

Lens maker and trained worker are semantically related. Sometimes you can replace phrase "Lens maker" with "Trained worker", this phrases are similar.