From the description of your symptoms, it appears that there is some inflammation in your eye that has increased slowly over the years.
This inflammation can be due to vitreous loss (thick fluid in the posterior part of the eye) during surgery which is causing irritation in your eye or any other complication.
You may be having an allergic reaction to the implant which is very rare.
Basically it is affected your retina causing blurred vision, specially for near vision. Before undergoing any procedure, I would certainly advise you to get a second opinion done, because the surgical intervention for the above two possibilities are different.
Also you might investigations like OCT/ FFA to determine the amount of edema in your retina pre-operatively.
These are investigations to know the status of the retina of the affected eye. OCT is like a scan of the retina. FFA (fundus fluorescein angiography) is an angiography of the retina. Both are OPD procedures and do not take much time. These investigations will help in knowing the amount of edema in the retina, which will help in deciding whether you need some treatment before surgery also in the form of injections or eye drops.
If your eye is blurry then it indicates that you might have a cloudy cornea (black portion of eye) or the inflammation is massive masking the posterior view. In an inflamed eye usually surgery is avoided until the inflammation is controlled, unless its an emergency. If the posterior part of the eye is not visible, then you would need a B scan which an ultrasound to determine the status of the retina.
I again believe that you need a second opinion.