<qa>  How long should the patients exposure to Irvine Gass Syndrom be monitored?20 to 25 patients suffering from Irvine Gass Syndrom should be monitored for at least six months, controlled monthly. In all cases best corrected visual acuity, Spectralis-OCT volume thickness scan, fundus photography Optomap, intraocular pressure, slitlamp assessment and indirect ophthalmoscopy should be performed on every visit. Fluorescein angiography should be performed at baseline and after 3 and 6 months. 