What is the primary purpose of an enzyme in the context of contact lens care?

The primary purpose of an enzyme in the context of contact lens care is to remove buildup. Enzymes are biological molecules that catalyze biochemical reactions, and in the case of contact lens cleaning solutions, they specifically target and break down proteins and other deposits that can accumulate on the surface of contact lenses over time. This buildup can include substances like lipids, mucins, and proteins from tears and the environment, which can affect the clarity of vision and the comfort of wearing contact lenses.

By effectively removing these deposits, enzymes help maintain the integrity and transparency of the lenses, promoting overall eye health and ensuring a better wearing experience. This function is essential for users who wear lenses regularly, as it aids in preventing infections and discomfort associated with dirty lenses.

The other options, while relevant to contact lens wear, do not adequately define the primary role of enzymes in lens care. Enhancing lens comfort, hydrating lenses, and improving vision quality can be achieved through other means, such as lubricating agents or specific lens designs, rather than through enzymatic action. Thus, the focus on the enzymatic function in debris removal makes this the correct answer.