I know that lots of people have trouble drawing identical eyes, I do too sometimes when I don't use my little helpful trick. But here's how I make them identical.
Draw two straight lines (with a ruler) and have the space in between vary for what size you'd like your eyes.
Draw two more lines in the middle that serves as the space between the eyes
Then draw a line in the middle like so, which is for where you'd like to have the corners of your eyes. If you'd like to have the outer corners of the eyes lower than the inner (and vice versa) then draw a line in the middle and then two lines on either side higher or lower than the line in the middle, like so;
(These eyes are a little funky but at least they're identical 😅)
Next you draw the top eyelid
And finish by adding the little bottom eyelid, the actual eyeball and any extra lid on the side of you'd like.
And ta-da!
-Tora_Tya- you're always saying you have trouble with making eye look identical