A 32 year old male presents with unilateral diminished vision in the right eye. On examination, there is mild iritis, vitritis and focal necrotic lesion is seen at macula. The most likely diagnosis is:-

The most common protozoal infection in adults is toxoplasmosis. The most common means of toxoplasmosis infection in the eye is through reactivation of trophozoites, primary infection occurs in the fetal life. The history strongly suggests toxoplasmosis as there is NECROTIC lesion in the retina with vitritis.