1 Clinical Applications of Retinal Optical Coherence Tomography
5
Fig. 1.4 Retinal layers on optical coherence tomography in normal subject
[1]. There are four hyper-reflective bands at outer retina: external limiting membrane,
inner segment ellipsoid zone, interdigitation zone, and RPE/Bruch’s complex. The
choroidal-scleral interface can be identified and the thickness of choroid can be
measured (Fig. 1.4).
1.2 Vitreomacular Interface Diseases
The vitreous body is a transparent structure which fills the space in front of the retina.
In physiological condition, vitreous body provides mechanical support for retina.
However, vitreous may degenerate with aging or under pathologic conditions. The
disorders at vitreomacular interface cannot be well-recognized until recently due to
the availability of OCT, which provides high resolution cross-sectional imaging for
visualizing the vitreomacular interface.
There are several disorders at vitreomacular interface, including vitreomacular
adhesion, vitreomacular traction, macular hole, epiretinal membrane. The disorders
of vitreomacular interface can be seen in aging population, and also secondary to
other diseases, such as high myopia, proliferative diabetic retinopathy, etc.
5
Fig. 1.4 Retinal layers on optical coherence tomography in normal subject
[1]. There are four hyper-reflective bands at outer retina: external limiting membrane,
inner segment ellipsoid zone, interdigitation zone, and RPE/Bruch’s complex. The
choroidal-scleral interface can be identified and the thickness of choroid can be
measured (Fig. 1.4).
1.2 Vitreomacular Interface Diseases
The vitreous body is a transparent structure which fills the space in front of the retina.
In physiological condition, vitreous body provides mechanical support for retina.
However, vitreous may degenerate with aging or under pathologic conditions. The
disorders at vitreomacular interface cannot be well-recognized until recently due to
the availability of OCT, which provides high resolution cross-sectional imaging for
visualizing the vitreomacular interface.
There are several disorders at vitreomacular interface, including vitreomacular
adhesion, vitreomacular traction, macular hole, epiretinal membrane. The disorders
of vitreomacular interface can be seen in aging population, and also secondary to
other diseases, such as high myopia, proliferative diabetic retinopathy, etc.