I can relate to this story a bit.
I had an Avastin injection in my eye 10ish years ago in my mid 20s. It turned out that I had a central retinal vein occlusion which caused me to suddenly lose vision in one of my eyes. There was lots of hemorrhaging and swelling of macula which made me lose vision.
One of the suggested ways to treat some of the swelling was by injecting Avastin into my eyes. The ophthalmologist said that there weren't really anything else to do at that point besides to let the eye naturally heal so I did take the chance to take the shot.
I experienced all of that anxiety that the author wrote about as just the thought of a needle injection into the eye is truly gruesome. But what everyone else on here have said is correct in that, they put all this stuff on you, antibiotic drops, anesthetic drops, and betadine and then they have you look up in the upper right hand or upper left hand corner as they inject into the white of your eye.
I remember this being the excruciating part as once the needle goes in, you shouldn't move your eye at all and keep it in that position or risk blindness (as the ophthalmologist put it). What was seconds seemed like minutes. Due to all the anesthesia, you feel no pain but you do feel this discomfort of pressure as the needle gets inserted into the eye.
Thankfully, I only required just one injection but I knew a lot of other elderly with macular degeneration and such who needed these injections regularly in order to not lose vision. The whole process was pretty professional but I don't know if I would want to go through that all again but I know that if it was between that or lose my vision, I think most people would decide to get the injections.