This procedure is performed with topical anesthetic instilled on the eye. A contact lens may or may not be used to focus the laser. During treatment, patients often note flashes of bright light in the eye and may feel occasional discomfort. After the treatment, the vision can have an increase in blurriness for up to 30 minutes post-procedure.. Laser photocoagulation is very safe procedure, but it does have some risks including but not limited to bleeding, loss of vision, eye discomfort, and the need for further treatment.. ...