The advantage of OCT inspection is mainly to display the three-dimensional spatial hierarchy of the site. The examination of macula is only mydriasis and fundus examination, which seems to be a two-dimensional plane structure. It is impossible to see which level or which level of change leads to maculopathy in the middle of the three-dimensional structure of macula.
OCT divides this part of macula into many grades, which can be divided into 6-7 grades. According to the advanced nature of OCT machine, the level is different and the degree of detail is different. As a whole, we can see a three-dimensional structure, from which we can observe which levels of changes lead to macular degeneration. This is just an example, which shows that OCT is an advanced and meticulous examination method, and it also provides good evidence for doctors to assist in clinical diagnosis.