Ok, glasses=prosthetic then. Just as exercising won't make a stump grow back a limb, neither will exercises cure a truly and solely refractive error.
Lobbies and the food industry are complex webs where politicians and corporations are involved. Obviously money is involved in these cases.
But like I said, I don't see where corporations and money factor in on ophthalmologists' opinions. These are not publicly traded stocks. There are no regulations and quotas that are constantly being changed every quarter. There are no banks or hostile takeovers. Ophthalmologists make their money from exams and surgery, not from selling glasses. Maybe you might argue that there is influence from pharmaceuticals' money on their schools. I doubt this, as the doctor business is quite lucrative without it. University administrators make lots of money without bribes, and would be risking it - not worth it. Regardless, the point being discussed is that people who manufacture glasses are somehow influencing the medical educational system and professional practice and opinion. You can argue that some optometrists sell glasses, so they might be influenced (although there is nothing to show that their educational system has money from that industry somehow changing the curriculum). But ophthalmologists make no money from that industry; there is no money trail. They do surgery and they do exams. The government pays them lots of money to do this. They pay their school to teach them these skills. The school gets money from tuition and from the government. The people who work for the university get a good salary and prestige, and many are also ophthalmologists, so they are making money already. Where is the money trail? So if they are not receiving pay-off money from the glasses and contact lens manufacturers for the entire profession to be quiet, why should they not point out the dangers of glasses? I'm sure if some fringe authors can find dangers from the use of glasses, then so could ophthalmologists, through their collective examination of millions of patients every year. Yet this has not been the case.