Combined Intravitreal Bevacizumab With Topical Timolol-Dorzolamide Eye Drops in Diabetic Macular Edema

This study is a double-blind randomized clinical trial in Diabetic patients (type 2) over 18 years of age who have diabetic macular edema with involvement of the central 1 millimeter (central macular thickness is more than 300 μm) and BCVA 20/30 or less who visit the retina clinic of Labbafinejad Hospital Are studied. (In patients with bilateral macular edema, only one eye is included in the study.) Complete ocular examinations (including best corrected visual acuity - anterior segment - intraocular pressure - dilated pupil funduscopy with severity of diabetic retinopathy), optical coherence tomography (OCT), EDI-OCT( Enhanced Depth Imaging Optical Coherence Tomography ) - as well as Optical coherence tomography angiography (OCTA ) are performed for all patients at baseline. Blood tests are also taken from patients for fasting blood sugar and HbA1C. Patients are then randomly divided into two groups. The first group is treated with injections of 1.25 mg of intravitreal bevacizumab monthly for 3 months (months 0, 1 and 2) with topical drops of Timolol twice a day and Dorzolamide twice a day. For the second group (control group), 3 injections of 1.25 mg of intravitreal bevacizumab monthly with artificial tears (twice a day as a placebo) are prescribed. Patients in both groups are visited 1 month after the third basic intravitreal bevacizumab (IVB) injection and complete ophthalmology examinations are performed and central thickness of macula is recorded based on the patient's OCT as well as the need for IVB re-injection. EDI (Enhanced Depth Imaging)-OCT and OCTA are performed again for all patients.