A mains electricity-powered (AC-powered) component of an electronic ophthalmic cryosurgical system designed for the electronic control of the cryogen contained in a connected cylinder through to a connected dedicated cryogen-cooled hand-held applicator (probe). This device will typically include a user control panel that displays user information such as ?ready to use?, ?elapsed time?, ?gas pressure status? and ?applicator tip freezing indicator?. It may provide a microprocessor automated user set-up, perform electronically controlled repetitive freeze and defrost cycles.