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Cristian A. Cartes, Leonidas Traipe, Claudia Goya, Francisca Roble, Carolina Cruz, Francisca Zuazo, Felipe Valenzuela, Daniel Varas; Differences In Structural Measurements Among Patients With Open Angle Glaucoma And Narrow Angle Disease. Invest. Ophthalmol. Vis. Sci. 2012;53(14):3274.
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to compair Axial Length (AL), Anterior Chamber Depth (ACD) , White to White (W-W) and Angle to Angle Distance (ATA) in patients with Open Angle Glaucoma (OAG) and Narrow angle disease (NAD).
we conducted a cross-sectional study in patients with OAG and NAD who underwent IOL Master (IOL-M), Orbscan (Orb) and Anterior Segment OCT (AS-OCT) imaging in the dark by two operators and gonioscopy by two ophthalmologist masked to the findings. An eye was considered to have NAD if it had a Shaffer’s mean score of four quadrants 2.5 or less on gonioscopy.Axial Lenght (IOL-M), ACD (IOL-M, Orb, AS-OCT), W-W (IOL-M, Orb,) and ATA (AS-OCT) were obtained in both groups.Patients with previous surgery, iridotomy, trauma and cataract with visual acuity less than 0,66 (snellen) were excluded.
40 eyes were examined (22 patients). 62.5% had narrow angles on gonioscopy. Mean (SD) age was 67 (7.7) years and 72.7% were women. Mean (SD) AL determined by IOL-M was 24.1 (1.01) for OAG and 22.36 (0.73) for NAD (p < 0.001). All the eyes with AL lesser than 22.5 mm had NAD diagnosis. ACD, W-W and ATA were significantly higher in OAG group and we found differences between the devices.
in our study, we found higher AL, ACD, W-W and ATA in patients with OAG compared with NAD, despite the tested devices were not regarded as compatible.
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