Cast Molding: Remove the lens and _________.

• A. Sterilize
• B. Hydrate
• C. Polish
• D. Inspect

Answer: (B)

After the lens is removed from the cast mold, it needs to be hydrated to reach its final water content and swollen dimensions. Hydration converts the polymer network into the soft, flexible hydrogel that teats like a real lens, setting the correct thickness, surface qualities, and optical properties. It also helps wash out any residual solvents or unreacted monomer from the manufacturing process before the lens proceeds to subsequent handling steps. Sterilization is handled later in packaging, polishing isn’t a step for soft lenses, and inspection typically occurs after hydration and cleaning, so hydration is the appropriate immediate next step.