Figure 3. Targeted rhodopsin testing in a patient with a clinical phenotype highly suggestive of altitudinal autosomal dominant retinitis pigmentosa (ADRP) led to the identification of the well-known P23H RHO mutation. A: Fundus autofluorescence demonstrates altitudinal hypo-autofluorescent dense bone spicule deposits inferiorly, with a thin hyper-autofluorescent band, consistent with an altitudinal ADRP phenotype. B: Kinetic semi-automated perimetry exhibited superior visual field loss corresponding to the altitudinal inferior retinal degeneration observed clinically.