Inspired by my own post to ask this.

@xXShinkoXx this would most likely be due to a conflict with another piece of cc that also utilizes the same area on the sim. For instance, the experimental version of Kijiko's lashes that fall in the skin details category causes some distortion and overlayment with the ring category because they cloned a ring and moved the affect area to the eye location so the texture overlays the lashes with ring graphics.

It could be as simple as another piece of cc somewhere in your folder conflicting with the lashes. for instance, I had a default replacement skin set (Sadly I cannot remember which one) that caused a similar look to the OP's sim with kijiko's glasses category lashes. Removing that skin set and choosing a different default replacement fixed the issue. I hope this helps some.