An improved student's ophthalmoscope / by A. Stanford Morton.

  • Morton, Andrew Stanford, 1848-1927.
Date:
1884]
Catalogue details

Licence: Public Domain Mark

Credit: An improved student's ophthalmoscope / by A. Stanford Morton. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    2. —The provision of a few separate, easily adjustable, lenses for extraordinary cases. 3. —The lens in the sight-hole is always indicated at the same place (except in the rare cases where one of the extra lenses, just mentioned, is used). 4. —The numbers of the lenses and their relative positions being fully exposed on an indicating disc, the direction in which this latter has to be rotated, to bring any particular lens to the sight-hole, is at once made manifest. 5. —There is only one driving-wheel. 6. —The provision of two mirrors revolving on a central pivot, so that either can be at once brought into position. 7. —The width of the instrument is only in., while the driving- wheel, being 3 in. below the sight-hole, is unimpeded in its action by contact with the face of observer or patient. 8. —Lastly, the instrument balances well in the hand, is light and packs into a small compass. N.B.—For those who wish, there is provision made for adapting a plane mirror to the back of the mirror of 10 in. focus, and for engraving a pupillometer on the face of the driving-wheel.