One industry body recommends that patients wearing hard contact lenses should stop wearing them for a minimum of six weeks plus another six weeks for every three years the hard contacts have been worn.
Jedna studija preporuča da pacijenti koji nose tvrde konatktne leće, trebaju ih prestati nositi najmanje 6 tjedana prije te još 6 tjedana za svake 3 godine njihovih nošenja.