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Prisms & Prism Bars

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6D Prism for use with Howell Cards
Code: SDT-873-P6D
6D Prism for use with Howell Cards. Prism shown is "base down" but other orientations can be supplied if specified at the time of order. ..
£24.60

Maddox Filter for Risley Prism
Code: SGR-968-MF
This red Maddox filter fits both the +/- 20 D and +/- 30 D Risley Prisms. ..
£42.80

Prisms Set of 16
Code: SGR-957-BP
This universal prism set is useful for a number of orthoptic and ophthalmic procedures. Supplied in a protective case. ..
£293.10

Risley Prism +/- 20 PD
Code: SGR-964-RP
Large aperture (23mm) rotating prisms permit more flexibility than a Phoropter. This version is +/- 20 PD and has a convenient handle. The prism is controlled using a knurled rotating knob. The accurately calibrated dial shows prism diopter and rotat..
£594.90

Risley Prism +/- 30 PD
Code: SGR-966-RP
Large aperture (23mm) rotating prisms permit more flexibility than a Phoropter. This version is +/- 30 PD and has a convenient handle. The prism is controlled using a knurled rotating knob. The accurately calibrated dial shows prism diopter and rotat..
£635.50

Vertical Prism Bar
Code: SGR-958-BV
This prism bar has the range 1, 2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 25, and 30D.    This instrument is ideal for measuring fusional reserves - which may help in the diagnosis of binocular vision problems - as well as for measuri..
£206.50