Where to Find:
These eyes are available in two flavors: non-default eyes and contacts. The non-default eyes appear in CAS as normal selectable eye colors just like you would select a Maxis eye color, but they do not overwrite any of the Maxis colors. As long as you don’t install too many non-default eyes custom content packages, you should be fine. If you do install too many, they won’t all have room to show up in your game.
The “contacts” are found in CAS under Makeup in Full Face Makeup. You can install as many “contacts” packages as you desire, and they’ll all show up. That’s the benefit of them. Well, that and you can change your contact color whenever without using cheats unlike default eye colors. You can install either flavor or both flavors. They won’t conflict with each other.