My father had lens replacement, he had so much trouble.
When was this? My aunt had it when it first came out in the US. She paid out of pocket as insurance still considered it experimental. It took quite awhile for her eyes to adjust and she ended up needing reading glasses anyway.
My sister had it, covered by insurance and she has no problems.
Of course, Nigeria may not be as advanced as the US. I know nothing about their medical system or if they even have one.