Axial length was measured before IVB using IOL master
. Intra Ocular Pressure (IOP) was measured before and after 1 minute of administration of Intravitreal Bevacizumab (IVB) using Tono-Pen.
and Lenstar were used to calculate the IOL power.
14 IOL constant optimisation can also be done from post-op refractive outcome data (around 50 eyes) into either the IOL master
, or by using online service of Dr Haigis.11 For optimisation of IOL constant, all eyes should have a stable refractive error and best-corrected visual acuity of 6/12 or better and as wide a range of axial length as possible and preferably all measurements should be done using the same devices for keratometry and axial length.
Anterior chamber depth from the endothelium and white-to-white measurements was measured with an IOL Master
(Carl Zeiss Meditec, Germany).
(2) The authors compared biometric measurements obtained from the Aladdin optical biometry instrument with those of IOL Master
, the accepted reference for optic biometric devices, and reported no significant differences between the two devices' mean ACD and keratometry values.
Keratometry was done by Nidek ARK 510A, axial length was measured by optical biometry using IOL Master
. Calculation of the IOL power to be implanted was done by the same person using four IOL power calculation formulae; SRK/T formula, Hoffer Q, Haigis formula and Holladay 2 formula.
Zeiss has also announced the launch of CT Lucia, a new hydrophobic monofocal intraocular lens for use in cataract surgery, as well as the IOL Master
Accuracy of intraocular lens power calculations using the Zeiss IOL master
. A prospective study.
Anterior chamber depth was measured in mm, by taking average of 3 readings, measured by optical biometry (IOL Master
, Carl Zeiss Meditec, Dublin whereas average peripapillary retinal nerve fibre layer pRNFL thickness was obtained by taking average of 12 segments RNFL thickness measurement, calculated by Spectral domain optical coherence tomography (SD OCT) (3D OCT-1000 Markll, Topcon Co, Tokyo, Japan) after dilating pupils with one drop of 1% Tropicamide, instilled three times, 10 minutes apart.