How can assembled lenses be defined?

Assembled lenses are best defined as lenses that have been combined with a frame or mounting. This definition encompasses the process of taking individual lenses, which may be prescription or non-prescription, and fitting them into a framework designed to hold them in place and provide visual correction and comfort to the wearer. The assembly of lenses with a frame is a crucial step in creating functional eyeglasses, making this definition accurate and comprehensive.

The other options do not adequately describe assembled lenses. For example, stock and trade over-the-counter lenses refer to lenses that are readily available for purchase without a prescription, which doesn't necessarily imply they are assembled with a frame. Lenses that have been manufactured but not verified by a qualified practitioner pertain to quality assurance and oversight, not the assembly process. Lastly, lenses manufactured by a hydrothermal molding technique define a specific production method rather than the assembly of lenses into eyewear. Thus, the correct definition focuses specifically on the combination of lenses with a mounting to create finished eyewear.