Rapid serial visual presentation (RSVP) is a scientific method for studying the timing of vision.
The observer is instructed to report one of these stimuli - the target - which has a feature that differentiates it from the rest of the stream.
People make errors in this task in the form of reports of stimuli that occurred before or after the target.
[1] Peripheral reading is vital to those suffering from central field loss, which is most commonly seen in the elderly.
Factors which might limit one's peripheral reading rate include acuity, crowding, and eye movements.