Cast-molded contact lenses are produced by which process?

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Prepare for the Certified Paraoptometric Assistant (CPOA) Exam. Study with extensive flashcards and multiple choice questions with explanations. Enhance your skills and knowledge to succeed.

Multiple Choice

Cast-molded contact lenses are produced by which process?

Explanation:
Cast-molded production means forming the lens directly in a mold from a liquid monomer that is cured in place, so the mold defines both curved surfaces. After curing, the lens is removed and hydrated to its final hydrogel state. This approach is distinct from lathe-cut, where a preformed blank is machined to size and shape, or from injection molding, which isn’t standard for conventional contact lenses. So the process described is cast molding.

Cast-molded production means forming the lens directly in a mold from a liquid monomer that is cured in place, so the mold defines both curved surfaces. After curing, the lens is removed and hydrated to its final hydrogel state. This approach is distinct from lathe-cut, where a preformed blank is machined to size and shape, or from injection molding, which isn’t standard for conventional contact lenses. So the process described is cast molding.

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