Skilled readers preprocess word n+1 while fixating word n. This allows them to shorten gaze times for word n+1 and it is called a parafoveal preview (PP) benefit. Dyslexics seem to lack PP benefit, but it is unclear whether parafoveal input is ignored, or if it is attended but generates visual-attentional interference (crowding). In the latter case, dyslexics’ gaze times should suffer the cost of parafoveal input (parafoveal load). We measured the PP benefit and the parafoveal load cost of dyslexic and non-dyslexic subjects in a modified rapid automatized naming paradigm. The PP benefit differed across groups and correlated with word reading speed, while the parafoveal load cost did not. The results suggest that dyslexics have a narrow attention window.