Its hard to really get enough fluid under the eyelid without a small, directed flow. It either is a direct eyeball hit (vs kinda shooting it in/under the lid), a drop, or a miss, in my experience. So having a really small opening is helping if you can get parallel to the eye and squirt it in the corner under the lid. You can kind of see the eye swell when you do it, like it does when they clean their own eyes.
Plus some of the cham’s eyes are small, where even a normal eye drop size is too large! For Penne, if I dont get her drops perfectly lined up, the bead covers and rolls off her eye instead of getting IN the eye.
Again, I think knowing how (and when) to flush the eyes is a good thing. My gripe is with the metal needle tip. From what Ive read from researching Penne’s issues, vets will use a needle with a very round bulb tip, or a soft tube, like shown above. I found photos of the same soft tip being used for the nasal flushes. Sometimes done under sedation.