The default lashes can block fine-tuning around the eyes. Removing them allows you to use better custom content (CC) lashes.
The Sims 4 is renowned for its character creator—Create-a-Sim (CAS)—which offers a massive leap forward in intuitive, drag-and-drop customization compared to its predecessors. However, for dedicated creators, storytellers, and Simmers who crave hyper-realistic or highly stylized characters, the vanilla sliders can feel limiting. Expanded Facial Sliders Mod Sims 4
Open The Sims 4 , go to Game Options > Other , and check "Enable Custom Content and Mods" and "Script Mods Allowed" . Restart: Restart your game. The default lashes can block fine-tuning around the eyes