Index - I
| ignored | Fresnel.Fold |
| Index | Fresnel.Ixed, Fresnel.At |
| involuted | Fresnel.Iso |
| is | |
| 1 (Function) | Fresnel.Optional, Fresnel.Prism |
| 2 (Function) | Fresnel.OptionalFold |
| IsFold | Fresnel.Fold |
| IsGetter | Fresnel.Getter |
| IsIso | Fresnel.Iso |
| IsLens | Fresnel.Lens |
| isn't | |
| 1 (Function) | Fresnel.Optional, Fresnel.Prism |
| 2 (Function) | Fresnel.OptionalFold |
| Iso | Fresnel.Iso |
| iso | Fresnel.Iso |
| Iso' | Fresnel.Iso |
| IsOptional | Fresnel.Optional |
| IsOptionalFold | Fresnel.OptionalFold |
| IsPrism | Fresnel.Prism |
| IsReview | Fresnel.Review |
| IsSetter | Fresnel.Setter |
| IsTraversal | Fresnel.Traversal |
| ix | Fresnel.Ixed |
| ixAt | Fresnel.At |
| Ixed | Fresnel.Ixed |
| ixList | Fresnel.Ixed |
| ixMap | Fresnel.Ixed |
| ixSet | Fresnel.Ixed |
| IxValue | Fresnel.Ixed, Fresnel.At |