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The recent rise in shared care programmes, fuelled by the recent NICE guidelines, has increased the demand among optometrists for a fast threshold test that is compatible with those used within the hospital eye service. To meet this demand the Henson 8000 has an additional new threshold test called ZATA (zippy adaptive threshold algorithm). It has also adopted the standard testing conditions and the standard printer output to aid comparisons between data collected with this instrument and that collected within the HES.
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