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    Bilateral consecutive optic neuropathy in a patient with thrombophilia
    (2013) Örnek N.; Onaran Z.; Örnek K.; Büyüktortop N.
    A 39-year-old man was admitted with a sudden visual loss in the left eye. Visual acuities were 10/10 on the right and 1/10 on the left. Fundus examination did not show any abnormalities. Visual acuity improved to 10/10 and visual field defect regressed in the following 2 weeks. Three years later, the patient returned with acute visual loss in the right eye. Visual acuities were 2/10 on the right and 10/10 on the left. Right optic disc had blurred margins with mild oedema. The tests revealed methylenetetrahydrofolate reductase A1298C mutation with positive lupus anticoagulant and hyperhomocysteinaemia. Enoxaparin was initialised with vitamin B12 supplementation. Complete visual recovery occurred in the following 3 weeks in both eyes. Thrombophilic screening seems to be important in the treatment and prevention of an attack in the second eye of patients with non-arteritic anterior ischaemic optic neuropathy. Copyright 2013 BMJ Publishing Group. All rights reserved.
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    Intralesional trypan blue-colored viscoelastic injection for the surgical management of dacryops
    (2013) Usta G.; Onaran Z.; Oğurel R.; Örnek K.
    During the surgical excision of dacryops which is a simple cyst of the lacrimal gland, a perforation of the thin wall of the cyst may lead to collapse of the lesion and complicate the surgery. Here we describe trypan blue-colored methylcellulose injection in the surgery of dacryops performed in a 53-year-old female patient to overcome this problem. In this way, since the application of the injection reduces the risk of complications and facilitates the surgical procedure, it could be considered as a useful modification of dacryops surgery. © Galenos Yayinevi.
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    Retrobulbar hemodynamics during healthy and preeclamptic pregnancy
    (2012) Onaran Z.; Bilgili Y.K.; Yilmazbaş P.
    Objective: We aimed to evaluate retrobulbar hemodynamics during healthy and preeclamptic pregnancy. Methods: We studied retrobulbar hemodynamics in 21 healthy pregnant, 20 preeclamptic and 21 non-pregnant fertile women. The peak systolic velocity, end-diastolic velocity and resistivity index (RI) of the ophthalmic artery (OA), central retinal artery (CRA) and posterior ciliary artery (PCA) were measured by color Doppler imaging. Results: The systolic and diastolic blood pressures of the preeclamptic women (155±8.5 and 105±7.5 mmHg, respectively) were significantly higher than those of healthy pregnant women (110±5.5 and 70±7.5 mmHg, respectively, p=0.008). The RI values of OA, CRA and PCA in healthy pregnant women were significantly lower than those of the non-pregnant women. The RI of the CRA and PCA in preeclamptic women were significantly higher than those of healthy pregnant women. Although there was no statistical significant difference, the RI of the OA was lower in preeclamptic women than healthy pregnant women. Conclusion: Resistance of all retrobulbar arteries decreased during healthy pregnancy. On the other hand, increased resistance was detected in PCA and CRA, besides the nonsignificant decrease in OA during preeclamptic pregnancy. Different auto regulator control mechanisms in response to hypertension seem to be responsible for the different conducts of different sized arteries of orbita during preeclamptic pregnancy. ©Copyright 2012 by Gazi University Medical Faculty.