An ablative laser removes sun-damaged or aging tissue by removing it in a controlled fashion from the outside in and allows the body to deposit new collagen. Acne scars can be improved by ablative lasers through the same principles. Non-ablative lasers target specific layers of the skin and can remove vascular malformations or tattoos in a controlled fashion without affecting the epidermis of the skin (outer layer).Non-ablative lasers target specific layers of the skin and can remove vascular malformations or tattoos in a controlled fashion without affecting the epidermis of the skin (outer layer).