With the eye drop trick you're simply foiling the loose pigment. It does help stick the product on but it doesn't last unlike Pixie Epoxy or Show Girl's Secret.
With Pixie Epoxy you get results like this:
From Get Lippie.
Lots and lots of videos on Youtube about it.
Pixie Epoxy is more on the creamy side than Show Girl's secret, which is like a water. I own both and prefer Pixie Epoxy. The brush that comes with Show Girl's Secret is HORRIBLE, better to use a thin eyeliner brush than their brush. I don't have pictures for SGS but I could do a few swatches tomorrow if you like to see a comparison between the two.
The downside to both is that both are super sticky but you have to work REALLY fast with both. The only thing I dislike about PE is the doe foot applicator which stains so I also recommend a small liner brush to dip into the tube.
From Fyrinnae's site:
Product Information A must-have for shimmery, sparkling shadows! This is not an eye shadow primer, or really a base. It is to keep sparkles on or to make shimmery shadows appear "glossy": a foiled look without foiling.
Originally developed and formulated for a friend/pro artist in 2008, this unique "glue" is designed to hold the sparkliest, most shimmery eye shadows in place, minimize "fallout", and also to easily create a foiled look without foiling. Don't worry, it's easily washed off, and while keeps shadows in a water-resistant state, the product itself is water-soluble (no silicones or oils). Polymers give the stickiness, while glycerin and propylene glycol keep it wet and slick on skin long enough to apply & blend shadows.
Packaged in a lipgloss tube/doefoot wand (we found this was easiest for application and least messy), all you need is a tiny dab (we're not kidding, use the tiniest amount you can manage!) rubbed on with wand or fingertip over your usual primer. Wait several seconds, as the Epoxy should be tacky but not wet, and apply dry loose shadow with a brush. More Epoxy may be desired for very glittery products. This product also enables the shadow to be brushed on rather than patted. Fingertip shadow application does not work well with this product, and shadow is best applied dry. Wet application may work, but not with every shade/texture. Translucent in the tube, applies and dries completely clear. May make some shades appear darker, and doesn't work as well with mattes. To help prevent creasing under matte and shimmer shades, please use an actual shadow primer under this. Pixie Epoxy is safe to use under eyeliner, but not recommended for application directly on the waterline. Our customers use this under pressed eye shadow as well as loose. We have a few tips here, and a lovely client created a video tutorial here. There's also a comparison by Phyrra Ma href="http://phyrra.net/2011/01/shadow-transformation.html">here
10 ml tube (sample is provided in a mini jar, at about 1.5 ml provides enough for at least 10-15 full uses)
Ingredients: Glycerin (vegetable derived), Purified Water (Aqua), Acrylamide/Ammonium acrylate copolymer, Propylene Glycol, Polyisobutene, Aloe Barbadensis Leaf Juice, Silica, Polysorbate 20, Carbomer, Polyaminopropyl Biguanide, Potassium Sorbate.
From Binary Star.
Sample size: $1.50
Full size: $5
Hard Candy's Show Girl Secret is $6 or $8, off hand I don't really remember.