Time Study for Biometry Measurements With the Lenstar and IntraOcularLens (IOL) Master 500

This is an open-label study randomized by sequence. Each eligible subject who signs a consent form and fulfills all Inclusion/Exclusion criteria will undergo ophthalmic measurements by the two test products: A. Haag-Streit Lenstar Version i4 B. Zeiss IOL Master 500 The order of measurements for the IOL Master 500 and the Haag-Streit Lenstar Version i4 will he randomized. The two possible sequences will be balanced (approximately 22 eyes each: AB,BA). One eye of each subject will be measured. Time needed to complete testing will be measured utilizing a stop-watch. Total time needed to complete all measurements of the study eye using each of the test products to capture a complete ophthalmic exam with the devices standard operating settings set to automatic measurement and analysis will be calculated by the following start and stop points: First Timed Measurement: Measurement Acquisition Start: When the technician starts to acquire tbe first measurement Stop: When the technician has completed all measurements Second Timed Measurement: Subject Data Entry Start: When the technician starts to enter the subject data. Stop: When the technician has completed subject data entry. Third Timed Measurement: Complete Ophthalmic Exam with each test product Start: When tbe subject is seated at the instrument, just prior to the technician entering any subject data into the test product. Stop: Upon completion of all measurements using one of the test products, just prior to printing results. Three trained technicians will operate tbe same study devices (Haag-Streit Lenstar Version i4 and IOL Master 500). Approximately equal number of subjects will be assigned to each technician.