Comparative study  between  central subfoveal Choroidal Thickness in Diabetic retinopathy  and control by Spectral domain optical coherent tomography    
 
Nagla Hassan Aly MD, Assistant professor at Memorial Institute for ophthalmic researches (MIOR) ,Giza Egypt. 01005293288, naglahas@yahoo.com.
 
Noura Khalid Al Qassimi ,German Board ,  ophthalmology  Consultant  at Sheik  Khalifa  medical city  ,Abu Dhabi ,UAE.  n_alqassimi@mail.com  
 
Key wards :  correlation,  Normal , OCT, early diabetic retinopathy , subfoveal choroidal thickness .
Title Comparative study  between central subfoveal Choroidal Thickness in Diabetic retinopathy  and normal by Spectral domain optical coherent tomography
 
Purpose: To compare subfoveal choroidal thickness (SCT) measurements by commercially available spectral-domain optical coherence tomography instruments between healthy eyes  and moderate   non proliferative diabetic retinopathy without macular edema.
Patients &Methods: 80 eyes of  patients whom ages ranged from   45-55 years both sex ,were  subjected to full ophthalmological examination including slit lamp biomicroscopy and FA for staging of the Disease( moderate NPDR without macular edema )
-best corrected visual acuity not less 20/40.
- IOP less than 21.
-Choroidal thickness (CT) was measured from the outer edge of the hyperreflective retinal pigment epithelium to the inner sclera at subfoveal region.
Accordingly the  patients were divided into 2 groups : -
• Group (1) 40 eyes of normal control.
• Group (2) 40  eyes with moderate non proliferative diabetic retinopathy type 2 where The mean central subfoveal choroidal thickness was measured manually by SD  OCT ( Topcon –seven lines protocol )  .
 
Results :Subfoveal choroidal thickness  showed significant decrease in moderate NPDR  compared to control group.
 
Conclusion : Mean  central subfoeval choroidal thickness is  decreased   in  moderate non proliferative diabetic retinopathy than normal control  using spectral domain OCT.