Described herein are devices, compositions, and methods for improving color discernment. These devices may be of benefit to both individuals having normal color vision and individuals having color vision deficiencies. The present embodiments relate to an ophthalmic device useful for enhancing color discrimination by persons having visual insensitivity between colors, e.g., correcting colorblindness, that enhances the discernment of one or more desired emissive bandwidths corresponding to a color that a person perceives as difficult to identify or distinguish. The bandwidth can be in the red, yellow, green, or blue region of visible wavelength light. In some embodiments, the ophthalmic device enhances the ability to distinguish a desired first emissive bandwidth by decreasing the transmission of a second emissive bandwidth. For example, a person having colorblindness may be able to perceive a first color, but confuse a second color with the first color. In some embodiments, the ophthalmic device can enhance the contrast or intensity between the two colors, increasing their distinction from one another. In some embodiments, the ophthalmic device comprises holographic elements which diffract a portion of light from the user’s line of vision. Advantageously, the ophthalmic device described herein may be clearly transparent (i.e. not tinted).本發明所述提供為一種裝置、組成及方法用以改善色彩辨識能力。這些裝置可同時有利於具有正常色彩視覺的人及具有色彩視覺缺陷的人。本實施例係關於一種眼科裝置用以輔助具有色彩視覺不靈敏的人辨識色彩,例如矯正色盲,增加一個或多個對應於人難以查覺以識別或辨別之色彩的預期發射帶寬之鑑別性。此帶寬可在可見光波長之紅色、黃色、綠色或藍色區域內。在部分實施例中,眼科裝置藉由降低第二發射帶寬的透射(transmission)來增加辨別預期第一發射帶寬的能力。舉例來說,一個患有色盲的人或許可察覺到第一色彩,但會將第一色彩與第二色彩混淆。在部分實施例中,眼科裝置可增加兩色彩間的對比度或強度以加強與另一色彩的區別性。在部分實施例中,眼科裝置包括全像元件用以繞射使用者視線的部分光線。有利地,在此所述之眼科裝置可為完全透明的(亦即無著色)。100‧‧‧感光介質101‧‧‧基板102‧‧‧波導103‧‧‧參考光束104‧‧‧菱鏡耦合儀105‧‧‧物射束
