Yes, you can still wear eye makeup after your beautiful, thick synthetic eyelash extensions are applied, but you will find that you do not need to apply mascara. In addition, you most likely will not need to wear eyeliner either, but may still choose to for more dramatic looks and of course, blending for the smokey eye effect. Your days of worrying if your mascara is smudged or running are over. The key is to remove make up with an oil-free product as any sort of oil can affect the special glue that is used to attached the synthetic eyelash extension to the natural eyelash.