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Scaling of Visual Acuity Measurements
Abstract
• Comparison of visual acuity measurements under different conditions (eg, age, refractive error, disease progress, recovery from injury) depends crucially on the scale applied to values of the minimum angle of resolution. Four kinds of scales are examined: the minimum angle of resolution (MAR) in linear, logarithmic, exponential, and reciprocal measures. To help construct an equal-discriminability scale for visual acuity, the standard errors of the mean minimum angle of resolution in five different retinal locations were determined experimentally in two observers. Because the ratio of standard error/mean was found to be nearly a constant, the logarithmic scale of MAR is recommended for adoption as a standard for visual acuity: in it the just noticeable differences in acuity are everywhere equal on the scale.
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Cited by
The Freiburg Visual Acuity Test???Automatic Measurement of Visual Acuity
Bach, M. (1996) · Optometry and Vision Science · doi:10.1002/j.1538-9235.1996.tb04409.x · Cited by 984
Dickersin, K. (1995) · JAMA: The Journal of the American Medical Association · doi:10.1001/jama.1995.03520320035038 · Cited by 393
Newman, N. J., Scherer, R., Langenberg, P., Kelman, S., Feldon, S., Kaufman, D., & Dickersin, K. (2002) · American Journal of Ophthalmology · doi:10.1016/s0002-9394(02)01639-2 · Cited by 338
Auestad, N., Montalto, M. B., Hall, R. T., Fitzgerald, K. M., Wheller, R. E., Connor, W. E., Neuringer, M., Connor, S. L., Taylor, J. A., & Hartmann, E. E. (1997) · Pediatric Research · doi:10.1203/00006450-199701000-00001 · Cited by 317
National Study of Cataract Surgery Outcomes
Steinberg, E. P., Tielsch, J. M., Schein, O. D., Javitt, J. C., Sharkey, P., Cassard, S. D., Legro, M. W., Diener-West, M., Bass, E. B., Damiano, A. M., et al. (1994) · Ophthalmology · doi:10.1016/s0161-6420(94)31210-3 · Cited by 276
Metadata
- Authors
- Westheimer, G.
- Venue
- Archives of Ophthalmology
- Publisher
- American Medical Association (AMA)
- Published
- 1979-02-01
- Volume
- 97
- Issue
- 2
- Pages
- 327-330
- ISSN
- 0003-9950 (ISSN-L)
- OpenAlex
- W2112401023
- Cited by
- 226
- References
- 0
- FWCI
- 1.35
- Type
- journal article
- Language
- en
- Open access
- closed
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- Westheimer, G. (1979). Scaling of Visual Acuity Measurements. Archives of Ophthalmology. https://doi.org/10.1001/archopht.1979.01020010173020
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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