AIM: To measure the macular thickness of normal young people by 3D 1000 optical coherence tomography(OCT)and study the repeatability of measuring results and the relationship between the thicknesses of macular and gender. At the same time, to compare our result with the data of other types of OCT, and to understand the consistency of the measuring results of macular thickness of different types of OCT.

METHODS: Totally 222 eyes in 111 young people were detected using 3D scan mode of Topcon 3D OCT 1 000(ver 2.4). Twelve cases(24 eyes)underwent repeatability check. We took transverse comparison between our measured results with other research's results.

RESULTS:There were 111 cases of young people, whose age were from 18-27 years old, all uncorrected and corrected visual acuity were ≥1.0, all intraocular pressure were <21mmHg. The average thickness of all macular region was 273.32±17.08μm. Retinal volume of macular area was 7.73±0.37mm³. Center thickness was 161-264μm, and the average thickness was 200.13±18.81μm. Central macular thickness were 188-273μm, and the average thickness was 229.00±18.20μm. The central macular thickness in men was significantly greater than that in women, and there was statistical difference. The results of repeated check of 12 cases(24 eyes)in the macular area were no statistical difference except the outer ring of nasal quadrant, and the repeatability of average thickness in central macular thickness was better than in center thickness.

CONCLUSION:The repeatability of macular examination is good. The central macular thickness can be better repeated than the center thickness. The central macular thickness is 229.00±18.20μm in young people, according to the 3D 1000 OCT measurements. There are statistical difference of central macular thickness between different genders.