| Reference Number | MIMM/2021-8/201 |
| Title | [Optical Filter] |
| Date | 1875-1925 |
| Description | Three coloured glass filters, each composed of a metal frame and four rectangular pieces of coloured glass (red, light blue, dark blue). |
| Extent | 3 items |
| Dimensions | 143mm x 95mm x 5mm |
| Digital Collections | View online in our digital collections |
| Copyright | Free to use under the terms of the Creative Commons Licence Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) |
| Credit Line | Royal College of Physicians of Ireland |
| Object Name | Optical Instrument |
| Term | Optical Devices |
| Ophthalmology -- Instrumentation |