Both RGP and soft lenses have certain advantages and disadvantages. As RGP lenses are dense, solid materials, they generally, but not always, provide sharper vision than soft lenses. They contain little or no water and do not require high levels of tear production to maintain water and therefore do not rely on the production of tears to maintain their structural integrity. RGP lenses are easier to keep clean and last much longer than soft lenses. They are generally less costly.
Soft lenses require a shorter adaptation period and are well suited for occasional use.
Compared to RGP lenses, they are not as susceptible to comfort problems when used in dusty or windy conditions. They are better suited for water sports and people play ing sports requiring rapid eye movements or that may involve contact with the face or eye. Contact lenses are an excellent means to optically correct the refractive error of the human vision system. They significantly reduce optical distortions due to their position in contact with the cornea, as compared to spectacle lenses. Peripheral aberrat ions and distortions are eliminated or greatly reduced.