What are these lines on the screen

A few months ago got a thinkpad t14 gen 3, when I opened it there was a small spot on the edge of the screen, it wasn't very noticeable so I decided to just ignore it. Recently though I noticed that it has grown from a spot to a line, and there is two of them on the left side of the screen. They are only really visible when I look at the screen from a weird angle. Is it safe for me to ignore this or is it something that I should fix. I have circled where the lines are in the attached pictures. I have not dropped it at all or done anything that would damage the screen.