Clouding after cataract surgery

I am a few weeks out from my lens replacement...  and I also had what you mentioned.  The spots that you see are most likely floaters...  they will probably go away after time.  The fog, or mist... (film),  that you have is mostly likely the sac or cellophane like lining called the lens capsule.  When the lens is inserted into the capsule to replace the natural lens...  it usually stays clear, but can turn cloudy or wrinkled and cause a blur or similar condition like you have mentioned.  It happenen to my left eye.  It's best to have your surgeon look more closely... you may have to have a posterior capsulotomy.  The technique is painless and  only takes a few minutes. This is done with the laser as it makes an opening in the back part of the capsule to restore your normal vision.  It took about 10 minutes and film was gone.  I was given a sample bottle of drops to apply for the next 4 days,  4x each day to the lasered eye to heal.

You really need to see either your cataract surgeon or another opthamologist to examine your eye to diagnose the exact cause and determine what needs to be done.

If it is the same as before surgery then its likely floaters as someone noted, which sometimes can be increased after cataract surgery with remnants of the lens or bits of lens capsule floating. Once you have the floaters in there before surgery, getting rid of the natural lens doesn't get rid of the existing floaters.  There is debate within the medical community over treatment for them, some are cautious about any treatment, while some use a special laser to zap the floaters, and others do a FOV,  a Floater only vitrectomy.

Someone already mentioned PCO as a possibility,   caused by cells growing over the surface of the lens. It used to be that the majority of  people got PCO at some point after cataract surgery, appearing anywhere from right away to a few years after. They've improved lens designs and surgical techniques to where its only a minority, I seem to recall seeing perhaps 15% now (not positive thats the exact figure) get PCO now. Someone winds up being unluckly and being the statistic. 

The laser treatment mentioned is called a YAG laser treatment (if you are doing searches), and is just a few minute procedure that zaps the cells. There is a minuscule risk that there will be regrowth and another YAG needed, with almost all though one treatmenttakes care of the issue.