The report describes research studies on the photochromic properties of the triplet states of aromatic compounds and their application to the problem of eye-protection against nuclear weapons. A flash photolysis apparatus with spectrographic recording was assembled and used to study a series o f 26 aromatic hydrocarbons. Triplet-triplet absorption spectra were found for 25 of the compounds. Techniques were developed for incorporating triplet compounds into plastic media. Apparatus for automatic spectrophotometric recording of T-T absorption in irradiated plastic specimens and for studying quantum yields and phosphorescence lifetimes were built. Theoretical studies were carried out on the possibility of increasing the quantum yield of triplet formation and the intensity of T-T absorption by chemical substitution. A theoretical evaluation was made of a model triplet state filter as an eye-protective device.