Figure 4 Relationship of best‐corrected visual acuity in the right eye (top) and in the left eye (bottom) with the age of patients with retinitis pigmentosa. Visual acuity decreases with age (p = 0.021 in the right eye and p = 0.054 in the left eye, Spearman's rank correlation test). Visual acuity is expressed as a logarithm of the minimal angle of resolution (LogMAR). Hand movement, light perception and no light perception are designated as 4, 5 and 6, respectively.