Biometry Measurements Using a New Large Coherence Length Swept-Source Optical Coherence Tomography

Abstract The swept-source OCT biometer (Argos) uses a 1060 nm wavelength and 20 nm bandwidth swept-source technology to collect 2-D OCT data of the full eye. The device measures the axial length and the anterior chamber depth, the central corneal thickness, aqueous depth, lens thickness, pupil size, the corneal diameter, and the corneal power in less than a second. The repeatability and reproducibility of the Argos measurements have been tested by means of variation analysis study and demonstrated that the new OCT biometer produces precise and reproducible measurements. Measurements made with the swept-source OCT biometer show a high acquisition rate compared with the IOLMaster 500 and the Lenstar biometers, especially in dense cataracts. The Argos swept-source optical coherence tomography measures the optical path length of each segment of the eye and uses a specific refractive index for each of these segments that has led to an improvement in IOL power calculation especially in long and short eyes.