EFFECTS OF POSTERIOR SEGMENT DISORDERS ON OSCILLATORY DISPLACEMENT THRESHOLDS, AND ON ACUITIES AS MEASURED USING THE POTENTIAL ACUITY METER AND LASER INTERFEROMETER

被引：9

作者：

BARRETT, BT

DAVISON, PA

EUSTACE, PE

机构：

[1] Department of Qptometry, Dublin Institute of Technology, Dublin, Kevin Street

[2] Department of Ophthalmology, Mater Misericordiae Hospital, Dublin, Eccles Street

来源：

OPHTHALMIC AND PHYSIOLOGICAL OPTICS | 1994年 / 14卷 / 02期

关键词：

D O I：

10.1111/j.1475-1313.1994.tb00101.x

中图分类号：

R77 [眼科学];

学科分类号：

100212 ;

摘要：

Oscillatory displacement thresholds (ODTs) were measured in 67 subjects with clear ocular media, but known posterior segment disorders. The ability of these thresholds to assess reduced visual function, as quantified by visual acuity deficits, was compared with that of the Potential Acuity Meter (PAM) and the Rodenstock Retinometer (RR). ODTs were found to be sensitive to acuity deficits which were retinal/neural in origin. Despite the fact that interferometric acuities are, unlike ODTs, a measure of resolution, the RR proved no more accurate in assessing the level of letter acuity which existed than did ODT measurement. As would be expected, the PAM provided for the most accurate means of assessing non-optical visual acuity deficits. However, the PAM proved to be less useful in eyes with: very poor levels of acuity, and certain anomalous conditions. The results have implications for the relative ability of each of the three tests to identify reduced visual function behind cataract.

引用

页码：132 / 138

页数：7

共 53 条

[41] Owsley C., Sloane M.E., Contrast sensitivity, visual acuity, and the perception of ‘real‐world’ targets, British Journal of Ophthalmology, 71, pp. 791-796, (1987)
[42] Lovie-Kitchin J.E., Validity and reliability of visual acuity measurements, Ophthalmic and Physiological Optics, 8, pp. 363-370, (1988)
[43] Wetherill G.B., Levitt H., Sequential estimation of points on the psychometric function, Br. J. Math. Stat. Psychol., 18, pp. 1-10, (1965)
[44] Westheimer G., McKee S.P., Integration regions for visual hyperacuity, Vision Res., 17, pp. 89-93, (1977)
[45] Watt R.J., Morgan M.J., Ward R.M., Stimulus features that determine the visual location of a bright bar, Invest. Ophthalmol. Visual Sci., 24, pp. 66-71, (1983)
[46] Bullimore M., (1992)
[47] Levitt H., Transformed up‐down methods in psychoacoustics, J. Acoust. Soc. Am., 49, pp. 467-477, (1970)
[48] Campbell F.W., Kulikowski J.J., Levinson J., The effect of orientation on the visual resolution of gratings, J Physiol., 187, pp. 427-477, (1966)
[49] Faulkner W., Predicting acuities in patients with cataracts, Br. J. Ophthalmol., 67, pp. 786-787, (1983)
[50] Bland J.M., Altman D.G., Statistical methods tor assessing agreements between two methods of clinical measurement, Lancet, 1, pp. 307-310, (1986)

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