Index - O
| octal | Numeric.Lens |
| offset | Control.Lens.Internal.Zipper |
| onceUpon | Data.Data.Lens |
| onceUpon' | Data.Data.Lens |
| One | Control.Lens.Internal.Level, Control.Lens.Internal |
| only | Control.Lens.Prism, Control.Lens |
| op | Control.Lens.Wrapped, Control.Lens |
| ordinals | |
| 1 (Function) | Data.Vector.Lens |
| 2 (Function) | Data.Vector.Generic.Lens |
| orOf | Control.Lens.Fold, Control.Lens |
| outside | Control.Lens.Prism, Control.Lens |
| Over | Control.Lens.Type, Control.Lens |
| over | Control.Lens.Setter, Control.Lens |
| Over' | Control.Lens.Type, Control.Lens |
| Overloaded | Control.Lens.Type, Control.Lens |
| Overloaded' | Control.Lens.Type, Control.Lens |
| Overloading | Control.Lens.Type, Control.Lens |
| Overloading' | Control.Lens.Type, Control.Lens |