Unaffected retinal function in eyes with toxic anterior segment syndrome evaluated by full-field electroretinography

A 60-year-old woman was suspected of having developed infectious endophthalmitis after cataract surgery. Corrected distance visual acuity (CDVA) was 20/25 in the affected eye with hypopyon and fibrin. Electroretinography (ERG) was normal except for slightly reduced dark-adapted (DA) 0.01 ERG. Anterior chamber irrigation detected no causative organism. Similarly, a 65-year-old woman was suspected of having developed infectious endophthalmitis after cataract surgery. CDVA was 20/100 in the affected eye with hypopyon and vitreous opacity. ERG was normal except for subtly decreased, but not delayed, DA 0.01 and 3 ERGs. Vitrectomy was performed, but no causative organism was detected. Both cases were diagnosed with toxic anterior segment syndrome (TASS) based on the aforementioned findings and because their intraocular lenses were linked to known TASS outbreaks in Japan. Retinal function was not affected in these cases with TASS.