Revolving drum for eye-testing, Snellin-type chart with four faces each which has a different test type Revolving eye-testing chart
Astigmatic fan chart, with sight testing card on back, cardboard, by Curry & Paxton, 195 Great Portland Street, London, England, 1890-1910. Astigmatic fan chart 1890-1910
Wall chart printed on both sides with test types for assessing visual acuity, published by Curry and Paxton, London, 1900-1920S Wall chart printed on both sides with test types for assessing visual acuity 1920-1950
Optometer (sight testing apparatus) to design of John Couper (Ophthalmic surgeon) made by Curry & Paxton, 195 Great Portland Street, London W, c.1890. Optometer (sight testing apparatus) to design of John Couper 1885-1895