Eccentric viewing helps people with central vision loss see better by utilizing their unaffected peripheral sight. Looking at a subject with damaged central vision makes it disappear; looking away makes it reappear in the peripheral field.
The method can be learned with practice by slightly averting the eyes (left, right, or even up or down). It can be very useful to daily function, navigation, and identification.
Also known as Preferred Retinal Loci (PRL).