The British Journal of Psychiatry 152: 278-280 (1988)
© 1988 The Royal College of Psychiatrists
Long-term phenothiazine administration and the eye in 100 Malaysians
CC Ngen and P Singh
Department of Psychiatry, National University of Malaysia, Kuala Lumpur.
Seventy-three out of a hundred Malaysians on phenothiazines for more than
24 months had ocular pigmentation. Seventy-one had conjunctiva
pigmentation. No pigmentary retinopathy or visual impairment was detected.
Frequency of pigmentation increased with age and with higher total dosage
prescribed, but there was no critical level below which pigmentation was
not detected.