Radiation-induced paramagnetic, optical and thermoluminescent centers were correlated for X-irradiated lithium disilicate glass. The main ESR signal at g=2.01 is the superposition of two lines, and is usually assigned to two optical centers in the visible range, but the present work rejected one-to-one correspondence between them. Radiation-induced centers bleached out at almost the same temperature irrespective of different thermal stabilities. This may be explained in terms of various possible combinations of the hole centers and electron centers.