There are several parts to this question:
- Yes. It is safe to undergo such surgery as it is in a separate eye. It will have no bearing on surgery that was performed in the other eye.
- If you are asking about replacing a monofocal IOL with a multi-focal IOL, this is safely performed by a surgeon with sufficient experience and skin in intraocular procedures. Do ask your attending Ophthalmologist what his/her experiences in such procedures are.
- If you are considering placing a multifocal IOL in one eye (if the contralateral eye has a mono-focal IOL), then this is not usually recommended by the IOL manufacturers. However this has been performed not uncommonly, and even the results are published widely. Ultimately whether the patient accepts this combination of IOL is up to the individual. You should make this decision in close consideration with your attending Ophthalmologist.
Thankfully, see answer 2) if necessary - it is possible to explant an IOL in order to replace it with another type, if so required.
