Diagnostic Tests

• Gonioscopy—anterior-chamber angles are to be open

• Applanation tonometry—elevated IOP (greater than 21 mm Hg) may be present. However, patient can have signs of optic neuropathy without elevated IOP

• Pachymetry—measures central corneal thickness. Thin corneas (less than 540 |im) are considered a glaucoma risk factor

• Automated static threshold perimetry—evaluates visual fields. Useful in diagnosis and determining if there is progression

• Other diagnostic tests—scanning laser polarimetry, confocal scanning laser ophthal-moscopy, and optical coherence tomography

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