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ORIGINAL ARTICLE
Year : 2017  |  Volume : 30  |  Issue : 2  |  Page : 532-537

Subfoveal choroidal thickness by enhanced depth imaging optical coherence tomography in typeII diabetes mellitus


1 Department of Ophthalmology, Menoufia University, Shebeen El-Kom, Egypt
2 Embaba Ophthalmic Hospital, Giza, Egypt

Correspondence Address:
Ahmed A Gad El Rab
Embaba Ophthalmic Hospital, Giza, 12651
Egypt
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/1110-2098.215464

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Objectives To evaluate the subfoveal choroidal thickness(ChT) in typeII diabetes mellitus(DM) using enhanced depth imaging optical coherence tomography(EDI-OCT). Background Diabetic retinopathy(DR) is because of hemodynamic abnormalities. The choroid provides oxygen and nutrients to the outer retina. EDI-OCT can image the choroid invivo. Patients and methods A prospective clinical randomized study was carried out focusing on 100 eyes of 100patients divided into two groups: groupA included 50 eyes of 50 diabetic patients with typeII DM (20–50years) and groupB included 50 eyes of 50 age-matched normal healthy controls with no sex or laterality specification. The subfoveal ChT, using EDI-OCT, was measured from the posterior edge of retinal pigment epithelium to the choroioscleral junction. Results The mean age of the patients was 42±7 and 39±9years in groupA and B, respectively. The mean DM duration in groupA was 7.96±3.9years. Subfoveal ChT was found to be 291±42μm in groupA[275.31±31μm for no apparent retinopathy(no DR), 298±42μm for nonproliferative diabetic retinopathy, 309±58μm for proliferative diabetic retinopathy, 277±29μm for diabetic macular edema(DME) absent, and 306±47μm for DME present], whereas it was 284±54μm in groupB. There was a statistically significant positive correlation between subfoveal ChT and DM duration(P=0.00). Conclusion Subfoveal ChT was found to be correlated with the stage of DR. Progressive thickening of the choroid with the progression of DR and/or the development of DME may reflect the concurrent progression of diabetic choroidopathy.


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