Visual acuities are 20/20 each eye. Color plate testing is full in both eyes. Lids, anterior segment, pupillary exam, and intraocular pressures are all unremarkable. Dilated fundus examination reveals cup:disc ratios of 0.3 OU along with normal maculae, vessels, and periphery. Goldmann visual field testing was performed and was full in both eyes. Motility reveals full ductions and versions in both eyes. However, there was a left hypertropia of 4 prism diopters in primary gaze. The left hypertropia increased on right gaze to 14 prism diopters. It also increased on left head tilt to 20 prism diopters. Vertical fusional amplitude testing revealed fusional amplitudes of 8-10 prism diopters.