Embodiments disclosed herein are directed to intraocular lens systems includes at least one intraocular lens device and methods of using the same. The at least one intraocular lens device includes one or more photodetectors and an intraocular lens exhibiting a modifiable focal length. The one or more photodetectors are configured to detect light that is used to determine a presence of the object or the apparent object distance. The focal length of the intraocular lens can be modified depending on the determined presence of the object or the apparent object distance.