The MNREAD acuity chart or Minnesota low vision reading chart is a text based chart used to measure near visual acuity in people with normal or low vision.[1] It can also be used to measure maximum reading speed, critical print size and the reading accessibility index of a person.[2] Digital and printed types of charts are available.[3]
The MNREAD chart consists of sentences with print size decreasing by 0.1 log unit steps, from 1.3 logMAR (Snellen equivalent 20/400 at 40 cm) to −0.5 logMAR (Snellen equivalent 20/6).[4] Charts are available in many languages. It allows near visual acuity recording in logMAR notation, Snellen notation or M-units.[5]