Certain filters have been found to enhance color discrimination for individuals with color vision deficiency (CVD), aka color-blind individuals. The filters generally include a multilayer optical film with a strong, narrow reflection band in part of the green region of the visible spectrum. The film has an average internal transmission from 420-680 nm of at least 50%, 60%, or 70%, and an average internal transmission 10%, 5%, 2%, or 1% over a 10 nm wide range that includes 550 nm associated with a reflection band having a width (FWHM) of 60 nm or 50 nm or less. The filter may include a magenta layer disposed on a viewer side of the multilayer optical film to reduce glare, the magenta layer selectively absorbing green light. The magenta layer combined with the multilayer optical film may provide a rejection band whose width (FWHM) is 60 nm or less.某些濾光片已被發現針對具有色覺障礙(CVD)之個人(亦稱為色盲者)加強色彩區別。該等濾光片通常包括具有在可見光譜之綠色區域之部分中之一強窄反射頻帶的一多層光學膜。該膜具有自420nm至680nm的至少50%、60%或70%之一平均內部透射率,及在包括550nm之一10nm寬範圍上的10%、5%、2%或1%之一平均內部透射率,其與具有60nm或50nm或更少之一寬度(FWHM)之一反射頻帶相關聯。該濾光片可包括安置於該多層光學膜之一觀看者側的一品紅層以減少眩光,該品紅層選擇性地吸收綠光。與該多層光學膜組合之該品紅層可提供寬度(FWHM)為60nm或更少之一拒斥頻帶。200‧‧‧系統201‧‧‧個人/觀測者202a‧‧‧入射光202b‧‧‧經濾光之光210‧‧‧多層光學膜210a‧‧‧主表面210b‧‧‧主表面211‧‧‧濾光片212‧‧‧吸收性品紅層214‧‧‧吸收性著色層
