| RefNo | PP/21/1/2 | 
| Previous numbers | PP/51-53/1 | 
| Level | Item | 
| Title | Diagram, lens diagram by Thomas Reid | 
| Creator | Reid; Thomas (fl 1892-1893) | 
| Date | [1892-1893] | 
| Description | A schematic diagram, labelled figure 1, demonstrating the refraction of light through the curved surface of the cornea.
  Subject: Ophthalmology
  A print of this diagram was published in volume 53 of the Proceedings of the Royal Society alongside the paper 'On a portable ophthalmometer'. | 
| Extent | 1p | 
| Format | Diagram | 
| PhysicalDescription | Graphite pencil on paper | 
| Digital images | View item on Science in the Making | 
| AccessStatus | Open | 
| RelatedMaterial | DOI: 10.1098/rspl.1893.0001 |