Vitrectomy with Focal Endolaser The vitreous fluid is the clear gel filling the posterior cavity of the eyeball. The physician applies a special contact lens to the cornea to better visualize the back of the eye. Three small incisions are made in the eyeball, near the juncture of the cornea and sclera. One incision is for a light instrument, one for an infusion instrument one for the laser. The physician extracts the vitreous fluid, using a mechanical cutting and suctioning process that may involve a special instrument like a rotoextractor or vitreous infusion suction cutter. Then, with focal endolaser photocoagulation, the physician uses a laser to treat minor retinal disorders. If the physician performs endolaser panretinal photocoagulation, a stronger laser treats larger retinal problems, like retinal detachments, diabetic retinopathy, or retinal holes. The instruments are removed and the incisions closed. Injections may be required to reestablish the intraocular pressure. A topical antibiotic or pressure patch may be applied.