A 21-year-old female presented for a routine exam with complaints of difficulty seeing while driving at night. Past ocular, medical and social history were unremarkable with the exception of oral contraceptive use. Family ocular history was notable only for senile macular degeneration in a maternal grandmother and moderate refractive errors in several family members.
Uncorrected visual acuity was 6/6 in both the right and left eyes. Refraction was -0.50 OU and color plate testing was normal in both eyes as were intraocular pressures. Anterior segments were unremarkable by slit-lamp examination. Posterior segments were as found in these photos: