Ordinal depth information from accommodation?

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      <subfield code="a">Ordinal depth information from accommodation?</subfield>
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      <subfield code="a">The abiblity to judge egocentric distance was assessed in two groups of six observers using a manual pointing task. The purpose of the study was to determine the extent to which blur-driven accommodation can provide information on target distance in the absence of any retinal cues to distance. It is concluded that accommodation can act as a source of ordinal distance information in the absence of other cues to distance but the contribution of accommodation to normal distance percepcion in full-cue conditions is questioned.</subfield>
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      <subfield code="d">London [etc.]</subfield>
      <subfield code="g">Vol. 43 nº 3, March 2000 ; p. 391-404</subfield>
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