I have just started wearing a painted or coloured one.It stops my double vision by blocking out all light.Got to say it is very strange it's like being blind in that eye.Taking it out is easy.Putting it in ,well in the hospital i did it without problems,At home it's taking four or five attempts.Mind you i am stood up at the bathroom mirror.Rather than sitting down at the hospital.i think i will get one free every six months.the saline will come from Wilkos 360 ml.and the lens cleaner from Superdrug so about £10 a month.I do have one question to ask in May.It's about wearing it only when i need it,or has it to be worn all day.I only get double vision watching telly or when up close to people,it's all very strange.