@article {hrynchak2003comparison,
	title = {A comparison of cup-to-disc ratio evaluation in normal subjects using stereo biomicroscopy and digital imaging of the optic nerve head},
	journal = {Ophthalmic and Physiological Optics},
	volume = {23},
	year = {2003},
	pages = {51{\textendash}59},
	publisher = {Wiley Online Library},
	author = {Hrynchak, Patricia and Hutchings, Natalie and Jones, Deborah and Simpson, Trefford}
}
