Abstract
·AlM ：T0 show frequency of prog ression and prog res—sion at the optic disc in prima ry open angle glaucoma
(POAG)．
·METHODS：A tota J of 33 patients (66 eyes)，14 maleand 19 female．aged 14 to 79 with POAG were imaged
using the Heidelberg Retina Tomog raphy II(HRT II)th reeor more times during follow—up periods of 6 years (2000—
2006)．Disc progression was determined by reg ressionanalysis of global and segmental changes in optic disc
parameters．Every patient was tested by Octopus G1 oncea year．Imaged optic disc pa rameters with scanning laser
tomog raphy were：rim a rea (ra)，cup／disc(C／D)，rimvolume(rv)，mean RNFL thickness(mRNFL)．Imaged
segments of the optic disc were：global(G)，temporal(T)，temporal superior(TS)，temporal inferior(TI)，
nasaI(N)，nasaI superior(NS)and nasaI inferior(N1)．
·RESULTS：Global frequency of prog ression according toc／d ratio existed in 34 eyes (51％ )，but 32 eyes (48％ )were w ithout frequency of prog ression． Prog ressionexisted in 12 eyes(18％ )in temporal，7 eyes (10．6％)intemporal superior (TS)，14 eyes (21％ ) in temporalinferior(TI)，8 eyes(12％ )in nasal(N)，7 eyes(10．6％ )jn nasaI superior (NS)，and 13 eyes (20％ ) in nasaIinferior(NI)segment．W ithout prog ression were 5 eyes
(8％ )．

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