7.4 Other types of OCT
Since its introduction in 1991, the technology of OCT has undergone continual evolution. SD-OCT brought faster scanning and higher resolution, allowing the creation of 3-dimensional imaging of retinal structures (see previous submodule). More recently, advances in SD-OCT technology have pushed the imaging capability of OCT further posterior in the eye, allowing imaging of the choroid and the choroidoscleral interface. The development of enhanced-depth SD-OCT (ED-OCT), swept-source ultrahigh-speed OCT (SS-OCT), and other high-definition SD-OCT technologies may have important implications in study of diabetic eye disease.