Koh, Lilian Hui Li Effect of head tilt on repeatability of optic nerve head parameters using cirrus spectral-domain optical coherence tomography. [electronic resource] - International journal of ophthalmology 2016 - 1170-5 p. digital Publication Type: Journal Article ISSN: 2222-3959 Standard No.: 10.18240/ijo.2016.08.14 doi