Oxio,

No you cannot. THere is not enough space in the capsular bag where they put the IOL for two IOLs. Besides, putting them on top of another won't work optically.

BUT, it is possible to remove the old one and put the new rezoom in it's place providing your current IOL can be removed. Only your doctor can say if it can be removed or not.

My opinion would be to simply use glasses. I have -2.25 and -2.50 in my glasses and am fine. I do only have 0.5 astigmatism though so maybe I don't know what I am talking about.

Take care.