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S. Yoon, J. Oh, E. Lee; Comparing Anterior Elevation Map and Central Corneal Thickness of Primary Open Angle Glaucoma with Different Visual Field Defect Stages . Invest. Ophthalmol. Vis. Sci. 2006;47(13):580.
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© ARVO (1962-2015); The Authors (2016-present)
To compare anterior elevation map by ORBscan IIz and central corneal thickness (CCT) of primary open angle glaucoma (POAG) with different visual field defect stages.
From the chart review of the patients who visited glaucoma clinic of Inha University Hospital in November 2005, following data have been collected from patients previously diagnosed as POAG; anterior elevation maps and CCT by ORBscan IIz, and visual field defect by standard automated perimetry (30–2 Humphrey threshold test). Perimetry results were classified into four groups; normal tests, early defects, moderate defects, and severe defects using the Glaucoma Staging System(GSS). With different GSS stages, anterior elevation map types and corneal center thickness were compared.
Among hundred and nine eyes (55 patients) with POAG, 30 eyes had early, 51 had moderate, and 29 had severe visual field defect. CCT was higher in eyes with severe visual field defect than moderate (515.9 and 539.5 um, p=0.014, ANOVA) while there was no difference between moderate and early visual field defect (533.8 um p>0.05). In POAG patients, central island type(37.30%) was most common. With–the–rule regular ridge(19.10%), against–the–rule regular ridge(15.50%), temporal ridge(13.60%), nasal ridge(10.90%), and saddle type(3.60%) followed in descending order of frequency. In POAG with severe visual field defect, cental island was relatively small compare to that of moderate and early visaul field defect (20.4, 37.3, 53.3%, respectively).
In POAG, CCT was thinner in severe visual field defect compare to that of moderate visual field defect. Incidence of cental island of anterior elevation map was relatively small in severe visual field defect compare to that of moderate and early visual field defect.
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