The present invention relates to an OCT system, comprising an OCT scan module for retinal scan; the OCT system further comprises a myopia scan module which can be added to the OCT scan module so as to switch the OCT system from a function of scanning an emmetropic eye to a function of scanning a myopic eye with longer axis length; the myopia scan module has negative power such that a scan beam from the OCT system before entry into a myopic eye with elongated axis length is divergent to increase a focusing angle of the scan beam focused on the retina of the myopic eye with longer axis length and to decrease a maximum OPD spanned by the imaged retina area, thereby obtaining a stronger scan signal and greater signal-to-noise ratio and avoiding false 'mirror images'.
MYOPIA SCAN MODULE FOR OPTICAL COHERENCE TOMOGRAPHY SYSTEM