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First Author: V.Fokin RUSSIA
Co Author(s): S. Balalin
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to study relationship between intolerance index (I int.), readings of ocular pulse and rapidity of glaucoma progression.
The S.N. Fyodorov Eye Microsurgery Federal State Institution, Volgograd Branch
there were examined 1310 patients with primary open-angle glaucoma (1638 eyes), receiving treatment for 2-7 years. All patients underwent static perimetry, ophthalmosphygmography, evaluation of their tolerant IOP (P0 tl) and intolerance index (I int=P0-P0 tl).
in cases of rapidly progressing glaucoma (38 eyes) I int exceeded 55 mm Hg (7,2ḟ0,2 mm Hg). In slow progressing glaucoma (74 eyes) I int was less than 5 mm Hg, its mean value equaled 2,6ḟ0,12 mm Hg. Stabilized glaucoma (1526 eyes) was characterized by I int averaging -1,5ḟ0,04 mm Hg. In 94,3 % of patients with POAG intolerance index was less than zero and was expressed by negative number IOP level was lower than level of tolerant IOP. In 5,6 % of cases I Int was less than 2 mm Hg.
progression of glaucoma was registered when IOP fluctuated above tolerant level. Value of intolerance index allows predicting dynamics of visual functions and rapidity of glaucoma progression.