Not sure how the quote you posted relates to your question, but GLP drugs effectively work by causing the slowing of stomach emptying, hence the feeling of fullness lasting...
Gastroparesis or stomach paralysis is a known adverse side effect. People are left with permanent or ongoing nausea, vomiting, gut pain, and often malnutrition. Some go on to develop bowel obstructions.
Visions loss has been studied more recently, as opticians notice cases occurring. For example: "A recent study published in JAMA Ophthalmology found a striking association between semaglutide use and nonarteritic anterior ischemic optic neuropathy (NAION), a leading cause of sudden vision loss. The study, which analyzed 16,827 patients, revealed that individuals prescribed semaglutide faced a significantly higher risk of developing NAION compared to those on other diabetes or weight-loss medications. Among patients with type 2 diabetes, the risk of NAION was increased by 4.28 times, while in those using the drug for weight management, the risk surged by 7.64 times. Over a 36-month period, the incidence of NAION in semaglutide users was 8.9%, compared to just 1.8% in the non-GLP-1 RA cohort."
These are not common side effects, but the massive uptake means more cases are coming to light. I personally would not want to risk either. YMMV.
Here's an article that explains some of the adverse effects, or you can just google them:
Patients Are Suing Over Alleged Side Effects of Weight-Loss Drugs | TIME