BionicReading struct BionicReading fixation UserDefaults key for fixation Declaration Swift public static let fixation: String saccade UserDefaults key for saccade Declaration Swift public static let saccade: String opacity UserDefaults key for opacity Declaration Swift public static let opacity: String © 2022 Bionic Reading GmbH Generated by jazzy ♪♫ v0.14.2, a Realm project.