Control of post-operative astigmatism

This study aims at examining the change of corneal curvature as a function of time following cataract surgery, the effect of the suture material used and effect of selective suture removal on final astigmatism. Patients and 38 patients who underwent Extra capsular cataract extraction and Intra Ocular Lens implantation at Queen Alia Military Hospital, with astigmatism of more than 3 Diopters, were followed up closely for 6 months with keratometric readings. Selective suture removal bet ween 8-10 weeks was performed and final astigmatism and stabilization of refraction was studied. Mean Keratometric reading difference 1st week post-operative accounted for 8.25 Diopters 79.5 degree for the V.S suture group [12 patients], while it accounted for 7.5 Diopters at 84 degree for the 10.o Nylon suture grup [26 patients]. The final mean Keratometric reading difference at 6 months in the V.S suture group accounted for 1.79 Diopters at 131.6 degree, while in the 10.o Nylon suture group it accounted for 1.6 Diopters at 121 degree. 90% of the patients achieved 6/6-6/12 corrected VA at 6 months final refraction. Astigmatism with the rule [WTR] was found in all patients 1 week post-op. There is a gradual decay of WTR astigmatism during the 1st 2 months period towards against the rule [ATR] astigmatism Selective suture removal at 8-10 weeks post-operatively allows accurate adjustment of astigmatism

Visual loss after coronary artery bypass surgery

Anterior ischemic optic neuropathy is caused by microvascular occlusion of the prelaminar or laminar portion of the optic nerve head. The main types are arteritic, non-arteritic, and autoimmune. Few cases were reported following coronary artery bypass surgery. A 63-year-old man, who is both diabetic and hypertensive, underwent coronary artery bypass graft complicated postoperatively by sudden visual loss in his right eye. The diagnosis was non-arteritic anterior ischemic optic neuropathy. Possible predisposing factors were crowded disc and internal carotid artery stenosis