功能性畏光症分級系統(Functional Photophobia Grading System),這是用於量化畏光症嚴重程度的一種方法。該系統由 Lane 定義,描述了功能性畏光症的五個行為階段:
參考來源:
Lane, B. C. (2001, March). The functional photophobia syndrome and binocular fusion in neuro-rehabilitation. Neuro-Optometric Rehabilitation Association Conference. New York.