Commonest infection causing blindness in adult man -: (A) Toxocara, (B) Plasmodium, (C) Toxoplasma gondii, (D) Tenia solium
Answer is C. Amongst the given options, only toxoplasmosis is a common cause of blindness.
"Toxoplasma infection is one of the most common latent infections of humans throughout the world".
"Almost all untreated congenially infected individuals will develop chorioretinal lesions by adulthood and about 50% will have severe visual impairment".