you have to build up your time with contact lenses I eventually used 30 day all day all night lenses and gave myself a weeks break from them every 4 wks .. tbh tho .. lense replacements without cataracts seems very extreme in my opinion and you cant guaruntee the result. I had cataracts in both eyes and chose to correct my distance vision which means i will need reading glasses...My lenses often feel like I am wearing contacts for those who havent worn them before. I would imagine though that surely if you were going to have 20/20 vision it wouldve been achieved with the initial surgery you had. I have had close up vision all my life and terrible distance vision ..I just think there is no comparison, putting on reading glasses now and again as opposed to permanently for distance vision is a no brainer for me. Unfortunately I got to the point with contacts where I would have to wear one distance one close and I found it very debilatating. Im interested to know how does the contacts work with the rest of your vision? I never thought it would be an option to wear contacts for reading assuming they will kill your distance vision?