A medical device in the form of a cartridge incorporating an assembly allowing the preservation of previously removed corneal tissue , the device comprising: - an at least partially transparent base , - at least one side wall , - means for receiving and locking corneal tissue, and - a transparent lid (C) for covering an opening in the side wall opposite the base , - a storage compartment containing a preserving fluid , - at least one inlet terminal upstream of the storage compartment , said inlet terminal being intended to be connected to a device for injecting compressed pressurizing gas, the pressurizing gas allowing: ∘ to eject the preserving fluid contained in the storage compartment to the preservation chambers, ∘ to maintain the preserving fluid at a predefined pressure, the device being configured such that, in use, the base , the side wall , and the lid (C) define with the corneal tissue endothelial and epithelial preservation chambers, characterized in that the device further comprises, upstream of the preservation chambers: - at least one control terminal upstream of the storage compartment , said control terminal being intended to be connected to a control compressed gas injection device , - a pneumatically piloted switching system downstream of the terminals , said switching system being piloted by the control compressed gas to allow or prohibit the flow of the pressurizing compressed gas to the storage compartment . - an at least partially transparent base , - at least one side wall , - means for receiving and locking corneal tissue, and - a transparent lid (C) for covering an opening in the side wall opposite the base , - a storage compartment containing a preserving fluid , - at least one inlet terminal upstream of the storage compartment , said inlet terminal being intended to be connected to a device for injecting compressed pressurizing gas, the pressurizing gas allowing: ∘ to eject the preserving fluid contained in the storage compartment to the preservation chambers, ∘ to maintain the preserving fluid at a predefined pressure, ∘ to eject the preserving fluid contained in the storage compartment to the preservation chambers, ∘ to maintain the preserving fluid at a predefined pressure, the device being configured such that, in use, the base , the side wall , and the lid (C) define with the corneal tissue endothelial and epithelial preservation chambers, characterized in that the device further comprises, upstream of the preservation chambers: - at least one control terminal upstream of the storage compartment , said control terminal being intended to be connected to a control compressed gas injection device , - a pneumatically piloted switching system downstream of the terminals , said switching system being piloted by the control compressed gas to allow or prohibit the flow of the pressurizing compressed gas to the storage compartment . - at least one control terminal upstream of the storage compartment , said control terminal being intended to be connected to a control compressed gas injection device , - a pneumatically piloted switching system downstream of the terminals , said switching system being piloted by the control compressed gas to allow or prohibit the flow of the pressurizing compressed gas to the storage compartment . <EOS>