AIM:To observe the clinical features of congenital optic disc pit.METHODS:The clinical data of 8 patients(9 eyes) were retrospectively analyzed.All patients were examined by fundus fluorescein angiography(FFA),optical coherence tomography(OCT) and visual field meanwhile.RESULTS:On FFA of all patients during the artery period,the optic disc pit presented dark area,which showed that the optic disc pit was hairless and capillary network unfilled.During the later period of FFA,fluorescein seeped from the optic disc pit to surroundings.On OCT the imperfection of sieve tissue on temporal side of optic disc presented dark area which had no reflection and optic disc macula place showed retinal edema.The visual field test showed physiological blind spot extension,bow form or fan-shaped visual field defection and damage connected with physiological blind spot.CONCLUSION:The application of FFA combined with OCT can make sure to see the sieve tissue imperfection on temporal side of optic disc and further confirm the communication of optic disc pit and macula,which can ensure the diagnosis of this disease.The combing of FFA and OCT can also make dynamic state observation of the development of optic disc pit,which can probably further explain the source of subretinal fluid and the occurrence mechanism of maculopathy.