Squish it.

You might be squishing a tomato fruitworm egg (bad bug). Or a green lacewing egg (good bug). Can you provide more description?

Thank you for all the help.I find a moth looking insect today I splash it with water.I am sorry but I am just not good at squishing bug or eggs.But my first tomato look very weird.I will try to upload the picture once I know how to.

green lacewing eggs are white and stand away from the leaf on a very fine thread.

I've got some eggs on the underside of a tomato leaf. They look salmon colored to me, but that may be because they're against a green leaf. They have a little dot in the center that is darker in color than the rest. I found a picture that looks similar except the color is blue-green.

Here is a link that might be useful: Pic of blue-green eggs

What lays clear eggs, I found a single egg on 3 different leaf underside.