What is one function of GP lens soaking solutions?

The function of GP lens soaking solutions is primarily to enhance the wetting properties of the lenses. Soaking solutions are designed to keep the lenses moist and hydrated, which helps to increase the surface wettability. When the wetting angle is reduced, it facilitates better adherence of the solution to the lens surface, making the lenses more comfortable to wear and easier to handle.

This property is crucial, as contact lenses that maintain a lower wetting angle are less likely to irritate the eyes by creating a smooth, hydrophilic surface. It also helps in reducing the chances of adhesion of debris and proteins to the lens surface, which can occur if the surface is not adequately wetted.

The other options primarily relate to aspects of lens structure and fit but do not align with the primary purpose of soaking solutions. Soaking solutions do not specifically serve to maintain lens diameter, prevent everting, or maintain the base curve but focus on ensuring that the lens remains comfortable and functional during wear.