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The Lister perimeter, supplied by Theodore Hamblin Ltd, consisted of a rotating arc with sliding colour targets. Note also the adjustable double chin rest, a round chart holder and an integrally mounted case of white, green and red colour targets.

From quite an early period various instruments existed to detect a patient's blind spot and to detect pathological change in his visual field.

Even today a simple target fixation test may be employed, using nothing more sophisticated than a pen, for example.

The first attempt to achieve a diagnostic result dates from 1856 when the Berlin ophthalmologist Von Graefe (1828-1870) used a campimeter to examine the visual field of a patient with amblyopia.

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