Do not, ever, swipe a q-tip across the eye of a gecko. You will cause corneal ulcerations and there’s very little chance you haven’t already done this with your gecko. If your gecko needs something like that, then a reptile veterinarian can perform it following a thorough exam including ocular health.
Leopard geckos can absolutely be born blind, just like any other animal- wherever you ahve gotten your info from is a very dangerous source and I suggest NEVER consulting that source(s) again. Leopard geckos can live wonderful lives without sight.
Given what you’ve just done to your gecko (literally spray chemicals in its eyes & do the equivalent of run sandpaper over them), you definitely need to take your baby to an experienced reptile vet. Your baby needs fluoroscein staining to check for ulceration. They can also prescribe you ophthalmic antibiotics if needed, which you will not be able to get over the counter.
I suspect your baby was born with deformed eyes (I have seen this before), but now you have potential seriously harmed the baby & it needs to see a vet (immediately).
HERE is how you find a reptile vet. A dog/cat vet does not have the experience necessary to treat your baby. I know that because I am a dog/cat vet.