The US insulin study group of the 1930s reported improvements in vision after injection of small amounts of slow insulin into the body. Leaky' retinas have stopped leaking after two to three injections, but treatment is usually continued for three weeks. Injection is shallow. It could be that IPT will be even more effective, especially when combined with appropriate medications. This mention of the stopping of retinal leaking could be very significant.
Laser photocoagulation can seal the leaks, but at the cost of damaging more retinal area.
Some other methods are being tried, including antiangiogenic drugs, sub-macular surgery, and laser photodynamic therapy. All of these methods are expensive, requiring advanced technologies out of the reach to most human beings who need help. I told her to remove them. Surprised, she realized that she could read without her glasses for the first time in 5 years. Perhaps IPT will be found to be able to rejuvenate the lens of the eye in people past middle age, so that its range of focus increases.