IOL Mester 700

The IOLMaster was the first optical biometer; the IOLMaster 700 now incorporates swept-source OCT technology, making it the first swept-source biometry device, 1 The features of this device can help users decrease refractive surprises and improve refractive outcomes, according to company literature. Swept-source biometry provides a full-length OCT image of the eye, showing anatomic details in a longitudinal cut through the length of the organ. Depiction of this image allows identification of unusual features of ocular geometry such as crystalline lens tilt or decentration, which could contribute to suboptimal surgical outcomes if undetected. The OCT image also provides a fixation check: If the image shows the foveal pit, the user knows that the patient achieved proper fixation; if not, the patient can be educated to fixate better on the target. The full-length OCT image of the IOLMaster 700 also displays measurement calipers so the user can visually verify what anatomic structures are being measured, rather than having to interpret which peak on an A-scan is the feature of interest. According to company literature, the swept-source device performs 2,000 scans per second. Anatomic measurements include the biometric parameters required for modern IOL power calculation formulas, including central corneal thickness, lens thickness, axial length, and anterior chamber depth.