advertisement
Abstract #6017 Published in IGR 2-2
Determinants of optic disc characteristics (letter)
Garway-Heath DFOphthalmology 2000; 107: 1217-1219
In this letter to the editor, the author makes the point that the true extent of any relationship between height, gender and refractive error, and optic disc neuroretinal rim area will be under estimated by the Littmann magnification correction, on the basis of spherical refractive error and keratometry. An accurate assessment of such relationships is only possible if magnification corrections are based on the actual length of the eye. The author illustrates this with some data from the normative database at Moorfields Eye Hospital. The comment relates to a study by Ramrattan et al. that claims an association between optic disc size and eye size, optic disc size and height in children, eye size and gender, and eye size and myopia. The original authors agree with the comment of the corresponding author that Littmann's estimation may deviate by some 2-7% from methods that additionally use axial length and anterior chamber depth. A number of technical data are provided in this rather extensive correspondence.
Classification:
2.14 Optic disc (Part of: 2 Anatomical structures in glaucoma)
