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T. N. Adabache Guel, C. Muñoz Barocio, A. Morales González; Optic Disk Size in Mexican Mestizo Population: Microdisk and Macrodisk Prevalence. Invest. Ophthalmol. Vis. Sci. 2010;51(13):2761.
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To determinate optic disk surface area in mexican mestizo population without known ocular pathology and in patients with glaucoma suspected optic disk and glaucoma diagnosis. To define microdisk and macrodisk diagnostic criteria and determinate its prevalence in this population.
200 eyes of mexican mestizo subjects without known ocular pathology or glaucoma related family conformed group 1. Group 2 was constituted by 1677 eyes of patients with glaucoma suspected optic disk and glaucoma diagnosis. For both groups, Heidelberg Retina Tomograph 3 (HRT3) tomography was evaluated. Mean optic disk area and standard deviation (SD) were determinated. Microdisk was defined as the optic disk area equal or smaller than the mean minus two SD and macrodisk as the optic disk area equal or greater than the mean plus two SD. The prevalence for both instances was determinated. Studies with thopographic standard deviation (SDt) equal or more than 30 µm were excluded.
12 studies from group 1 were excluded. Mean optic disk area was 1.974mm2 (4.34-1.0 mm2 SD ±0.529 mm2 ). Microdisk was defined as the optic disk surface area equal or smaller than 0.915 mm2 and macrodisk as those who showed surface areas equal or greater than 3.033 mm2 . Macrodisk prevalence was 2.65%. No microdisk cases were demonstrated for this group.In group 2, 486 studies were excluded. Mean optic disk area was 2.451 mm2 (5.08-0.46mm2 SD ±0.623mm2 ). Microdisk and macrodisk prevalence was 0.068% and 15.909% respectively.
Mexican mestizo population without known ocular pathology shows optic disk surface areas smaller than those for other ethnic groups and, for the other hand, mexican mestizo population with glaucoma suspected optic disk and glaucoma diagnosis have optic disk surface areas and macrodisk prevalence greater than those without known ocular pathology.
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