The invention relates to photochromic compounds of general formula: ##STR1## in which R.sup.a, R.sup.b and R.sup.c denote hydrogen; alkyl; aryl; OR, SR, COR or COOR, in which R denotes hydrogen, alkyl or aryl, amino of formula NR.sub.1 R.sub.2 in which R.sub.1 and R.sub.2 denote hydrogen, alkyl, cycloalkyl, aryl, R.sub.1 and R.sub.2 being capable of forming with the nitrogen atom, a heterocycle containing 4 to 7 members and capable of containing, in addition, one or more heteroatoms chosen from nitrogen, oxygen, sulfur, a halogen atom; a mono- or polyhaloalkyl group; an NO.sub.2, CN or SCN group; n and m denote integers from 1 to 5 depending on the number of substitutions on the nucleus and p may be equal to 1 or 2 depending on the number of substitutions on the nucleus; H is an aromatic heterocycle having 4 to 7 members containing one or more heteroatoms chosen from nitrogen, oxygen, sulfur, these heterocyclic nuclei being capable of being substituted by one or more alkyl, alkoxy, amino, aryl or aralkyl groups or condensed with an aromatic nucleus, and to their use in ophthalmic optics.
该发明涉及通式为:##STR1##的光致变色化合物,其中R.sup.a、R.sup.b和R.sup.c表示氢;烷基;芳基;OR、SR、COR或COOR,其中R表示氢、烷基或芳基,
氨基的通式为NR.sub.1 R.sub.2,其中R.sub.1和R.sub.2表示氢、烷基、环烷基、芳基,R.sub.1和R.sub.2能够与氮原子形成含有4至7个成员并能够含有一个或多个来自氮、氧、
硫、卤原子的杂原子的杂环,单取代或多取代的卤代烷基;一个NO.sub.2、CN或SCN基团;n和m表示1至5的整数,取决于核上的取代物数目,p可以等于1或2,取决于核上的取代物数目;H是具有4至7个成员的芳香杂环,含有一个或多个来自氮、氧、
硫的杂原子,这些杂环核能够被一个或多个烷基、烷氧基、
氨基、芳基或芳烷基取代或与芳香核融合,并且用于眼科光学。