For normally sighted individuals, slow reading is associated with poor comprehension. Experimental research on the relationship between reading and vision have found that degrading the visual properties of text, or low vision, slows reading rate. Low vision professionals earlier assumed that comprehension was lowered by slow rates, however, recent studies have proven this untrue. When readers with macular loss (who presumably had good comprehension prior to loss) completed a rehabilitation program, and attained a high level of visual skills using low vision devices, measured reading comprehension was not related to measured reading rate. The effects of macular loss on reading rate is similar to intentionally slowing the presentation of materials, a procedure that also does not effect comprehension. Given the opportunity, people adjust scrolled reading rate to maintain a constant level of comprehension. Based on the evidence, one cannot assume that among adults, a visual impairment that slows reading will also impede comprehension. In adults with macular loss, who have good visual skills and cognitive abilities, the visual requirements for good comprehension would be met by the visual requirements for even a very slow reading rate. Low vision appears to create an information “bottleneck” that slows the transmission of information from the printed page to the language centers of the brain. Once past the bottleneck, the information may be processed normally.