Abstract: The disclosure provides for an apparatus for intraocular lens selection. The apparatus may include a biometer and an autorefractor. The biometer may be configured to obtain at least two ocular measurement parameters for an eye. The autorefractor may be configured to obtain a post-operative refraction of the eye. The apparatus may also include a user interface configured to obtain a lens selection parameter for the eye, a memory, and a processor communicatively coupled to the biometer, the user interface, the autorefractor, and the memory. The processor may be configured to determine an intraocular lens power based on a formula using the at least two ocular measurement parameters. The processor may be configured to correlate the at least two ocular measurement parameters, the intraocular lens power, and the post-operative refraction as a training set.

Abstract: A shutter system for a movie camera or the like which controls the exposure of film including a main shutter wheel rotatably mounted on an axis and first and second adjustable shutter wheels positioned adjacent to and coaxially rotating therewith. The first and second adjustable shutter wheels may selectively pivot relative to the main shutter wheel in opposite angular directions so as to close off a portion or all of the arcuate apertures within the main shutter wheel.