A 32-year-old Indian woman presents with acute onset of pain, photophobia, and blurred vision in the right eye for 3 days. On examination, visual acuity is 6/24, and slit-lamp reveals fine keratic precipitates, anterior chamber cells (3+ grade), and fibrin in the anterior chamber. Intraocular pressure is 18 mmHg. Fundoscopy shows mild vitritis with a few white infiltrates in the posterior pole. Chest X-ray is normal, and serum ACE level is normal. What is the most likely diagnosis?