The infant eye trainer is a device that is mountable on a baby bottle for strengthening and developing infant eyesight. The device utilizes interchangeable media producing an image on a display, which may be viewed by the infant while drinking from the bottle. A variety of images designed to improve, strengthen, and facilitate infant eyesight development, both physically and cognitively are selected for display. The device mounts onto the end of a baby bottle, thus placing it within an infant's focal range. The device may also utilize audiovisual stimuli to further develop infant eyesight and cognition.