“…Macular changes using spectral domain OCT were done monthly using 3D-2000 Topcon FA plus (Topcon, Tokyo, Japan) in Lebanon, Spectralis (Heidelberg Engineering GmbH, Heidelberg, Germany) in Egypt and Cirrus (Carl Zeiss Meditec, Dublin, California) in India. Central macular thickness (CMT) measurements (mean thickness in the central 1000 μm diameter area) were corrected for machine use according to established formulae 9 12. Intraocular pressure was measured using applanation tonometry.…”