This LoRA is designed to enhance eye details while keeping the rest of the image as unaffected as possible. From my testing, the best balance is usually around a weight of 0.4, since higher values can start to interfere too much with the image or make the effect stronger than intended.
At 0.4, it improves the eyes in a controlled way while preserving the overall style and character design. I also usually use this LoRA together with my general Details LoRA, with both set to 0.4 weight, and they work well together without causing noticeable conflicts.
One important limitation is heterochromia. This LoRA was trained mostly with characters whose eyes are the same color, so it can sometimes cause problems with heterochromatic characters by altering or mixing the intended eye colors. Because of this, I usually avoid using it on characters with heterochromia.
