Advantages:

To define the morphology of outer choroidal margins in swept source optical coherence tomography (SS-OCT).

Methods:

This is a prospective observational study of 180 eyes: 20 eyes of healthy volunteers, 20 eyes of myopic patients and 20 eyes from each of the following groups: macular hole (before and after surgery), lamellar macular hole, epiretinal membranes, drusen, dry age related macular degeneration, neovascular age related macular degeneration, vitreomacular traction. The main outcome measure we selected was the ability to delineate the outer choroidal layer using the software available and to determine the shape of the outer choroid. In addition, we wished to estimate the presence of lamina suprachoroidal (LS) and visible suprachoroidal space (SCS).

Effectiveness:

SS-OCT uses a longer wavelength than conventional OCT devices, which enables exact visualization of the outer choroidal margin (lamina suprachoroidal, LS). SS-OCT has enabled visualization of the suprachoroidal space in vivo in eyes without choroidal effusion. SCS was observed in half of the eyes with full thickness macular holes and in half of the eyes with dry age related macular degeneration. This may enable the creation of precise choroidal maps.