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6Barry JC, Effert R, Kaupp A, et al. Computer-assisted measurement of ocular misalignment in infants and young children using the digital Purkinje reflection pattern procedure.Ophthalmologe, 1994,91:51-61.
7Hunter DG, Guyton DL. Vertical location of the corneal light reflex in strabismus photography. Arch Ophthalmol, 1998,116:767-771.
8Barry JC, Effert R, Reim M, et al. Computational principles in Purkinje I and IV reflection pattern evaluation for the assessment of ocular alignment. Invest Ophthalmol Vis Sci, 1994,35,4205-4218.
9Barry JC. Hirschberg erred here:the correct angle factor is 12 degrees promm corneal reflex decentration. Geometric optical analysis of various methods in strabismometry.Klin Monatsbl Augenheilkd, 1999, 215: 104-113.
