OBJECTIVE:To inwestigate the value of fundus fluorescein angiography in evaluation of idiopathic senile macular hole(ISMH). METHODS:fundus fluorescein angiography(FFA)and other clinical examination were performed in 26 cases (31eyes)of ISMH patients. RESULTS:Full-thickness macular holes were in 17 and lamellar holes were in 14 of the 31 eyes. Hyperfluorescencequot;window defectquot;was found at the base of all the eyes with full-thickness maeular holes and 2 eyes with lamellar holes. The size of hyperfluorescence zone was smaller than that of those seen in redfree film, hyperfluorescence in 6 eyes (19.4%) showed homogenous ancl 10 eyes (32.5%) granular in pattern. The small yellowish dots in macular hole showed blocked fluorescence,while the halo of macular hole showed hyperfluorescence. CONCLUSION:Fundus fluorescein angiography was useful in differentiating lamellar from full-thickness macular hole and understanding the degree of retinal pigment epithelium damages in macular holes. （Chin J Ocul Fundus Dis,1996,12: 208-210 ）