Do you mean tears or years?

You can wait until you have a new leaky blood vessel to get the next injection, but doctors recommend getting the shots regularly as a preventive, because you may not get all your vision back once bleeding starts. I have been getting the shots for about 20 tears, and I have long ago stopped dreading them, In fact, I usually thank God they are available. Before the shots were available, they used a laser to cauterize leaky blood vessels in eyes. My right eye has no central vision because of a long-ago laser treatment.