There are many potential non-beneficial conditions that could happen due to surgical obesity treatment or bariatric surgery. One of them is failure to lose weight or even bigger weight gain that would come afterwards which can hit an individual really strong on the mental level. Also, there is a big chance of suffering from bacterial infection and numerous risks due to anesthesia.
A not potential benefit of surgical obesity treatment is the increase of your sight. It won't help any sight or listening condition.
Explanation:
First of all, surgical obesity treatment as a technique helps you only to increase the reduction of weight. It is a very effective short and long term treatment, but because it is only based on digestion. It won't help you see better, listen better, have better cognitive performance. So because it is a focused treatment it won't provide you any benefit after weight loss and digestion. Also, the absorption of nutrients will be lower due to the bypass, so after the surgery, you need to change your diet into a healthy one.