The flexible standard reference plane allows for automatic determination of intrapapillary variables once a disc border contour line is interactively defined. In contrast to a fixed offset reference plane (e.g. 320 microm below the mean retina height), the interindividual variability of optic disc topography (oblique insertion, glaucomatous surface flattening) is respected at the cost of the need for an accurate optic disc border outline.

In spite of the special anatomical conditions in patients with RAM the biometric formulas as modified by Haigis produced reliable IOL power calculations. The best accuracy was achieved when aiming at a target refraction in the range of +/-2 dptr.

images in clinical medicineT h e ne w e ngl a nd jou r na l o f m e dic i ne n engl j med 355;6 www.nejm

In selected cases the opening of the posterior limiting membrane may be considered for treatment of early preretinal haemorrhages.

No abstract