Ok now, here's my quick edit.
As you can see, I reduced the number of colours and added some contrast and a bit of aa to smoothen your lines.
Your outline, I changed to black; It's not always necessary but I like it like that ;o
For all your outlines, use one colour, not a bunch of them strung up to make a line of shades.
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Oh yeah for the lens, they were a bit funky, so I suggest just increasing the size instead of having a vague black outline resembling the shape of goggles in a reduced opacity background.
(side note: remove the background when submitted items)