Ohgren's line passes from
A theoretic line passing between the medial canthus of the eye and the angle of the mandible; used as an arbitrary dividing line in classifying localized tumours of the maxillary sinus; tumours above the line invade vital structures early and have a poorer prognosis, whereas those below the line have a more ourable prognosis. It is an imaginary plane drawn, extending between medial canthus of eye and angle of the mandible. (Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 233)
Medial canthus to angle of mandible
Lateral canthus to angle of mandible
Medial canthus to mastoid process
Lateral canthus to mastoid process
Nose and paranasal sinuses