DUBLIN, Calif.--(BUSINESS WIRE)--A new suite of optical coherence tomography (OCT) software applications for the Cirrus™ HD-OCT has been cleared by the U.S. Food and Drug Administration (FDA) for commercial distribution. The Cirrus HD-OCT 4.0 with Retinal Nerve Fiber Layer and Macular Normative Databases is indicated for in-vivo viewing, axial cross-sectional, and three-dimensional imaging and measurement of anterior and posterior ocular structures.