to bring a claim in negligence there has to be a duty of care (which there is) and that duty needs to be breached.. It is proving the breach which is problematical .
The consequences of negligence have to also be reasonably foreseeable.
In your case the consequences of the operation (not the negligence) as side-effect it appears are known and you were made aware of those but nonetheless you went ahead with the surgery which, as it happens, didn’t work in full.
It would have to be reasonably foreseeable that although the surgery worked the psychological part to your brain did not. That is obviously reasonably foreseeable because you are given a video and the possible side effects were explained to you but you still gave your consent to the operation knowing the risk, something called “informed consent”.
If you wanted to bring a claim (and there is a claim here but it’s an extremely difficult one to bring) you would have to prove firstly that the procedure had been done negligently and/or secondly that you had not been advised of the risks.
Just because they gave you a video and asked you to watch it doesn’t necessarily mean they explain the risks to you unless they actually asked you the specific question and you sign something (which they should have asked you to do) which confirmed that you had had the risks explained to you but still wanted to go ahead regardless. If they didn’t do that then the chances of bringing a claim are increased.
With regard to any alleged negligence, to bring a successful claim you are going to need expert evidence from a specialist ophthalmic expert which confirms that in your particular case something went wrong and as a result of that, you’ve had this surgery which was in effect a waste of time. Without that expert evidence this claim will not go anywhere.
You might want to see a solicitor that deals with clinical negligence matters on a no win no fee basis and if you can find one that has experience of ophthalmic procedures, so much the better. You may struggle to find a firm that would take it no win no fee but it is certainly worth making a few telephone calls.
This is not going to be an easy claim because you openly admit that the surgery went according to plan and it was your brain link which didn’t connect. The other thing which I have already mentioned is whether they explained to you the potential risks and side effects that this may not work.
Can I clarify anything ?