Thanks for the updated designs of #10 and #11. I like the idea of trying something iconic; creating a symbol that may not look exactly like an eye, but creates instant recognition when used over a long period of time. For example, the McDonald's "Golden Arches" have nothing to do with a hamburger, but when you see it over and over, it is immediately recognizable. We don't want something too abstract, because our audience (physicians and patients) will tend to prefer something simple and recognizable. The spiral iris is a good step toward the iconic theme, but I am hoping you can think of something else that evokes the eye, but isn't exactly the eye.