Left eye visual fields by SAP showed inferior altitudinal field defects and OCT for RNFL analysis showed RNFL thinning in all quadrants except lower temporal and infero-temporal quadrants which had normal thickness.
Central scotomas were noted on confrontation, but HVF showed bilateral, inferior altitudinal field defects. Colour vision was severely impaired (0/15 on Ishihara pseudoisochromatic plates) and funduscopy revealed bilateral profound optic atrophy (Fig.