My vision has deteriorated very noticeably during the past year - since I've been taking two supplements, Avipaxin and tyrosine oral spray. The Avipaxin is an herbal acetylcholinesterase inhibitor prescribed for joint pains and memory issues, the tyrosine for energy. Is it plausible that either supplement could have caused my visual decline? 64years old, 5',105lbs.,health generally good - didn't need reading glasses until 50years of age, distance glasses until 64year.