I've taken DHA enriched soy milk, so unfortunately that didn't help. Based on the link I posted, there's two types of HPPD. Type 1 is temporary and recovers, type 2 is chronic. I have type 2. I haven't tried any of the prescription meds though as most doctors are unfamiliar with this condition and the one neuro-ophthalmologist (who was hands down the best doc ever) I saw is no longer in practice sadly.