#$%^&*AU2020202299A120200423.pdf#####ABSTRACT 5 An apparatus to maintain an environment over an anterior surface of a patient eye can include an enclosure sized and shaped to be seated about the patient eye to form a cavity within the enclosure. The enclosure can be configured to contain a fluid other than ambient air in contact with the patient eye. The apparatus can include a fluid regulator in communication with the enclosure, where the fluid 10 regulator can be configured to regulate the composition of the fluid contained within the enclosure. 48
