1.   A Food and Drug Administration warning on the product cautions that the lasers can cause more eye damage than staring directly into the sun.

2.   However, if pointed directly at the eye, the lasers can cause more damage than staring into the sun, the FDA warned.

3.   Lasers also cause less scarring and swelling, and often require fewer follow-up stitches.

4.   The laser also caused side effects -- such as incontinence or problems with ejaculation -- in fewer patients than did traditional surgery, the company said today.