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Joao M Furtado, Adriana Berezovsky, Nivea Nunes Cavascan, Sergio Munoz, Marcos Jacob Cohen, Cristina Cunha, Marcia Regina Kimie Higashi Mitsuhiro, Jacob Moyses Cohen, Rubens Belfort Jr, Solange Rios Salomao; Anterior Segment Optical Coherence Tomography in Healthy Older Adults from Parintins City: The Brazilian Amazon Region Eye Survey. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):6206. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
To evaluate anterior chamber angle (ACA) and angle opening distance at Schwalbe’s line (AOD-SL) measured by anterior segment optical coherence tomography (AS-OCT) in healthy adults from Parintins, Brazilian Amazon Region.
The Brazilian Amazon Region Eye Study (BARES) is a population-based study on prevalence and causes of blindness in adults aged 45 and older from urban and rural areas of Parintins, Brazil. Out of the 1180 urban participants, 63 healthy subjects underwent AS-OCT horizontal scanning (iVue-100, Optovue, Inc) of the nasal and temporal anterior chamber angles of their right eyes. AOD-SL and ACA were assessed by three independent examiners. Their values were analyzed to investigate possible correlations between AOD-SL and ACA. Associations of these variables with gender, age, spherical equivalent (SE) and schooling were also studied.
Mean nasal and temporal ACA were 29.83±10.320 and 27.77±9.670, respectively. Mean nasal and temporal AOD-SL were 454±187.29µm and 430.65±187.30µm, respectively. There was a good positive correlation between ACA and AOD-SL when measured nasally (r=0.75; p<0.01) and temporally (r=0.76; p<0.01). Nasal and temporal ACA were significantly (p=0.02; p<0.01) greater in males (35.30±8.680; 31.79±10.200) than in females (26.71±10.040, 25.23±8.510).<br /> Nasal and temporal AOD-SL were significantly (p<0.01; p<0.01) greater in males (579.41±216.24µm; 536.50±229.37µm) than in females (382.33±124.79µm; 365.51±118.17µm). There was no association between AOD-SL and ACA with age, schooling or SE.
A wider anterior chamber angle and angle opening distance by Schwalbe’s line in this population was found in males. These data will help to characterize a normative database for anterior chamber measurements to this population. Further studies with larger sample sizes including patients with prevalent eye conditions in that geographic area, such as cataract and pterygium, should be conducted.
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