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ref : 13436
Available
In good condition
Used accessory.
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Available values: 1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 25, 30, 35, 40
With 45 (single prism)
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What is a horizontal prism bar used for?
A horizontal prism bar is an orthoptic/optometric instrument used to measure and quantify horizontal ocular deviations (exo- or esodeviation) and to assess fusion/binocular vision.
Main uses:
Measure the magnitude of horizontal strabismus (in prismatic diopters) by placing prisms of increasing power in front of one eye until the deviation is neutralized.
To assess phoria (latent deviation) and manifest deviation using the alternating cover test.
To test fusion ability and determine the direction of the deviation (base-in = exo, base-out = eso).
To assist in prescribing corrective prisms for diplopia.
Brief Instructions for Use:
Orient the prisms base-in or base-out according to the presumed direction of the deviation.
Add prisms gradually until the sclero-conjunctival shift or diplopia disappears.
Read the prism diopter value indicated on the bar.
Checked by OPHTAZON
2
Year of mfg.
-
Available
Checked by OPHTAZON
2
Year of mfg.
-
Available
Checked by OPHTAZON
3
Year of mfg.
-
Available
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