Inclusion Criteria:  Patients with Diabetes Mellitus type 1 and 2  Exclusion Criteria:  Proliferative diabetic retinopathy History of cataract surgery severe nuclear and cortical cataract Glaucoma Intraocular pressure (IOP) greater than 21 mmHg Familial history of glaucoma Narrow angle (Van Herick 1, 2) Cup to disc ratio greater than 0.5 Pregnancy Pterygium Corneal ectasia History of keratorefractive surgery Corneal dystrophy Iris disorders Anisocoria Iris neovascularization Use of miotics or mydriatics