I was terrified of an eyeball injection
(Ophthalmologist):
To any future HN reader scared by those intraocular injections: don't fear them. I'm on my way to the operating room and going to perform cataract surgery under topical (=eyedrops only) anesthesia, as I always do, and as most surgeons today do. Patients won't feel anything except water slightly flowing on the eye surface.
The surgical knife is 2.2mm wide : the 25 Gauge needle is 0.260mm wide. Anesthetic eyedrop work amazingly. 
Patients can actually feel the eye speculum (pro tip: open wide both eyes++, it will be less disturbing) and the itchy feeling of Betadine, and the touch of the needle : that's usually all.Don't postpone eye injections because of fear: if it is indicated, there is usually some degree of emergency.