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19th Century Rare Mirror Oldham Ophthalmoscope. This is a pocket type folding brass ophthalmoscope made in England by Hills, London. This is a modification of Helmholtz Augenspiegel ophthalmoscope that includes a silvered mirror with a central hole for reflected light source (possibly flame) and a revolving disc carrying a series of 10 lenses holes for eyes of different refraction (+1 to + 8 and -1 to – 4). Lenses 2 and 6 are complete, lenses 1 and 2 are slightly cracked and lenses 0, 1, 4, 8 4 and 3+ are missing. The length of the instrument is 9 cm (3 ½ inch) and with the chrome-plated handle folded, the ophthalmoscope length is only 5 cm. |
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