Oct Angiography Changes After Local Anesthesia in Cataract Surgery

prospective , interventional,comparative , clinical study utilizing a pre-post, within-subject design ,which will be conducted in the Department of Ophthalmology ,Sohag University Hospital ,Egypt.

Optical coherence tomography angiography (OCTA) will be performed before and after the administration of retrobulbar and peribulbar local anesthesia in the same cohort of patients, in order to evaluate the immediate effects of the anesthetic intervention on retinal microvascular parameters.the study will be conducted on patients aged 40-80 years with elective cataract surgery requiring regional block.the study will be divided into two main groups :

• Group with peribulbar anesthesia injection.
• Group with retrobulbar anesthesia injection.

Inclusion criteria

• patients aged 40-80 years.
• patients with elective cataract surgery requiring regional block.

Exclusion criteria

• 1.Allergy to study drugs. 2. Media opacities affecting OCT imaging (corneal pathologies, dense cataracts, vitreous.

opacities, etc). 3. Patients with any other retinal vascular diseases (retinal vein occlusion, central serous chorioretinopathy, age-related macular degeneration, etc).

• Patients who have had previous intravitreal injections or Laser treatment. 5. Patients who underwent previous vitreoretinal surgeries. 6. Patients with uncontrolled glaucoma or ocular inflammations (eg: vitritis). 7.Patients with diabetes mellitus or hypertension.