 So, you got awesome eyelash brushes but you don't know how to deform them. Not a problem. If you left click drag out your brush and hold shift they will come out at perfect 90 degree angles. From here if you press W you can move them around with the gizmo and once you got them vaguely in place, click the gear and hit bend curve. You will see orange dots which you can then start dragging around and if you ever want more control you can left click drag the orange arrow over here and if you want you can hold shift to move them at perfect angles. Now usually that will be all you need but if you ever want even more control go back to the gear and try the deformer. And it will create a cage of points around your shape. This is essentially the same as the lattice modifier in blender. You can left click drag any of the points you see and if you hold shift you can select multiple points and move them at the same time. If you hold control and left click drag you'll be able to mask the points that you don't want to move and if you hold control and left click on empty canvas you will invert your selection. And finally if you hold control and left click drag in empty canvas you will clear your selection. I hope that helps and as always I hope you have a fantastic day and I'll see you around.