A patient had seven irregular hyperpigmented macules on the trunk and multiple small hyperpigmented macules in the axillae and groins since early childhood. There were no other skin lesions.Which is the most likely investigation to support the diagnosis?

• A. Examination of fundus
• B. Retinal artery angiography
• C. Slit-lamp examination of eye
• D. Measurement of intraocular tension