Sclera Sclera The sclera, also known as the white of the eye, is the opaque, fibrous, protective, outer layer of the human eye containing mainly collagen and some elastic fiber. In humans, the whole sclera is white, contrasting with the coloured iris, but in other mammals the visible part of the sclera matches the colour of the iris, so the white part does not normally show. In the development of the embryo, the sclera is derived from the neural crest. In children, it is thinner and shows some of the underlying pigment, appearing slightly blue. In the elderly, fatty deposits on
His Eye Is on the Sparrow His Eye Is on the Sparrow "His Eye Is on the Sparrow" is a Gospel hymn. The song was written in 1905 by lyricist Civilla D. Martin and composer Charles H. Gabriel. It is most associated with actress-singer Ethel Waters who used the title for her autobiography. Mahalia Jackson's recording of the song was honored with the Grammy Hall of Fame Award in 2010. The theme of the song is inspired by the words of David in the Psalms and Jesus in the Gospel of Matthew in the Bible: "I will instruct thee and teach thee in the way which