If the eyebrows have become so dense that it becomes a reason for repugnance in the ladies husband, then it is permissible to trim them to a more appropriate and normal size. (Ahsanul Fataawa Vol 8)
To trim them to a more appropriate and normal size does not mean to trim the eyebrows ? so they appear ?paper thin? or such designs which are prevalent today are normal. Normal is implying the natural norm appearance of eyebrows which is has not been tampered with.
Please also refer to the previous answer regarding eyebrow plucking.
