| Label | Dataset | Type | Subdivision | Identifier | |
|---|---|---|---|---|---|
| 1. | Bifocal lenses |
LC Subject Headings (LCSH) |
Topic SimpleType Authority |
sh92006732 | |
| Bifocals ; Lenses, Bifocal | |||||
| 2. | Progressive lenses (Ophthalmology) |
LC Subject Headings (LCSH) |
Topic SimpleType Authority |
sh2008003171 | |
| Graduated lenses (Ophthalmology) ; No-line bifocal lenses ; PALs (Ophthalmology) ; Progressive addition lenses (Ophthalmology) ; Progressive power lenses (Ophthalmology) ; Progressives (Ophthalmology) ; Variable-focal-length lenses (Ophthalmology) ; Varifocal lenses (Ophthalmology) | |||||
Do you need assistance with your search?