Can standard cataract lenses be replaced by premium?
In theory, Yes. In practice, you should carefully consider the considerable risks and modest benefits. An intraocular lens becomes sealed into place within the clear, cellophane -like capsule that once held your natural lens. This capsule becomes increasingly hard and inflexible with time. The lens implant can be tightly adherent to it. So, over time, it can be very difficult to remove the IOL without causing damage to the capsule or to other parts of the eye. Furthermore, the new IOL may or may not be seated in the exact same position, making the prescription change a little bit.
While not 100% true, you should think of an IOL as being permanent.
_Written by J. Trevor Woodhams, M.D. - Chief of Surgery, Woodhams Eye Clinic