The article reviews recent studies on eye movements in reading and other information processing tasks, emphasizing reading as a specific example of cognitive processing. Key topics discussed include the characteristics of eye movements, perceptual span, integration of information across saccades, eye movement control, and individual differences. The review highlights that eye movement data reflect moment-to-moment cognitive processes in various tasks. The article also discusses theoretical and practical considerations concerning the use of eye movement data. Over the past 20 years, significant advancements have been made in eye movement recording systems, allowing for more accurate and easier measurements. These advancements have enabled innovative techniques, such as eye-contingent display changes, which have enhanced our understanding of cognitive processes. The review covers the basic characteristics of eye movements, saccade latency, visual field and acuity, attention, developmental changes in eye movements, and the measurement of eye movements. It also delves into the relationship between eye movements and cognitive processes in reading, including the acquisition of information during reading, the perceptual span, and the influence of writing system characteristics and reading skill on the perceptual span. The article concludes by discussing the challenges and limitations in measuring processing time and the importance of considering multiple measures to accurately assess cognitive processing.The article reviews recent studies on eye movements in reading and other information processing tasks, emphasizing reading as a specific example of cognitive processing. Key topics discussed include the characteristics of eye movements, perceptual span, integration of information across saccades, eye movement control, and individual differences. The review highlights that eye movement data reflect moment-to-moment cognitive processes in various tasks. The article also discusses theoretical and practical considerations concerning the use of eye movement data. Over the past 20 years, significant advancements have been made in eye movement recording systems, allowing for more accurate and easier measurements. These advancements have enabled innovative techniques, such as eye-contingent display changes, which have enhanced our understanding of cognitive processes. The review covers the basic characteristics of eye movements, saccade latency, visual field and acuity, attention, developmental changes in eye movements, and the measurement of eye movements. It also delves into the relationship between eye movements and cognitive processes in reading, including the acquisition of information during reading, the perceptual span, and the influence of writing system characteristics and reading skill on the perceptual span. The article concludes by discussing the challenges and limitations in measuring processing time and the importance of considering multiple measures to accurately assess cognitive processing.