Figure 4: Visual acuity and visual field in function of age. Visual acuity Snellen chart decimal values (A) and percentage of normal visual field (B) were plotted in function of age for autosomal recessive (circles) and autosomal dominant (triangles or squares) retinitis pigmentosa cases. Linear fit lines are shown. For autosomal recessive cases, the mean visual acuity and mean percentage of the remaining visual field, and mean age for each of both values are indicated as large circles on the fit line. Standard deviations are shown. For autosomal dominant cases, the same data are indicated as a large square for visual field (B), or as a left-oriented (moderate disease) or a right-oriented (mild disease) triangle for visual acuity (A). Ligth grey upper-oriented triangles in A correspond to normal visual acuity values (>1) which have not been considered in the calculations.