الفهرس 
History and Evolution of OCTOnly 14 pages are availabe for public view
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Abstract
OCT is a widely used non invasive technology in
clinical ophthalmic research.
Now the spectral domain OCT is the commonly used
rather than time domain OCT , as spectral domain OCT is
more superior than time domain OCT in image acquisition
time, better resolution, high sensitivity, better image
segmentation. All of these advantages of spectral domain
OCT allows high differentiation of various retinal layers
and high detection of subtle lesions.
Spectral domain OCT has many advances, as its role
in assessment of chorioretinal blood flow as many ocular
diseases are associated with alterations in retinal and
choroidal blood flow.
Doppler OCT can reliably assess retinal blood flow in
vivo of many retinal and optic nerve diseases such as
glaucoma, non arteretic ischemic optic retinopathy,
proliferative diabetic retinopathy, branch retinal vein
occlusion and all are accompanied with lowering in the
average blood flow than normal.Spectral domain OCT allows choroidal imaging with a
new technique known as enhanced depth imaging
technique which automatically captures the cross-sectional
image with the choroid close to the zero delay line to
maximize the sensitivity on the outer limit of the choroid.
The choroidal thickness decrease in age related
macular degeneration, high myopia and retinal dystrophies
while increases with central serous chorioretinopathy .
Choroidal tumors are characterized by loss of choroidal
architecture.
Other advances of spectral domain OCT is
identification of various ocular structures according to their
polarization properties by polarization sensitive OCT.
Ocular structures are divided into polarization preserving,
depolarizing or polarization scrambling and birefringent
tissues and differentiated by specific color scale.
Normal polarization patterns can be distorted in the
presence of diseases according to each disease.
Also spectral domain OCT is applied to the surgical
microscope (microscope mounted OCT) to obtain images
immediately during surgery and to detect retinal changes
resulting from the surgical procedures. Microscope.