Don't flush disposable contact lenses .
i don't wear contacts of any sort so I am unfamiliar with them but If you flush your disposable contact lenses down the loo it makes them a major disaster for the environment .
They do not dissolve they float on the top of sewage by the millions and are so tiny they are spread on the land with fertiliser .They are then washed down to the sea to cause damage there by getting into the food chain.
They are an environmental no no.