Abstract
The characteristics of artificially induced anisometropic suppression were investigated in observers with normal and abnormal binocular vision (anisometropic amblyopia) by using a simple reaction time paradigm. Reaction time was measured as a function of stimulus intensity for various stimulus durations. For all conditions, the reaction time increased as stimulus intensity decreased toward threshold. We found that traditional techniques for modeling this trend were inadequate, so we developed a simple visuogram method for comparing these functions. Using this technique, reaction time versus intensity functions are shown to be shape-invariant for all conditions examined. This means that, although reaction times are longer during induced anisometropic suppression or in anisometropic amblyopia, they are the same if contrast is normalized to equate threshold. The shape-invariant nature of these functions is also consistent with the notion that a single mechanism mediates detection under these conditions. Temporal summation was investigated at both threshold (method of limits) and suprathreshold (criterion reaction time) levels. Again, because of shape invariance, the suprathreshold results mirror the threshold results. The critical duration (the duration at the intersection of the complete summation and zero summation regions) is not affected by any of the conditions. However, the critical intensity (the intensity for the zero summation region) is higher for the amblyopic eyes, as compared with the normal or nonamblyopic eyes. Induced anisometropic suppression always increases the critical intensity, with a smaller increase occurring for the amblyopic eyes. This suggests that amblyopic eyes do not have a need for strong suppression.
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Birch, E. E., Shimojo, S., &Held, R. (1985). Preferential looking assessment of fusion and stereopsis in infants ages 1-6 months.Investigative Ophthalmology & Vision Science,26, 366–370.
Blackwell, H. R. (1946). Contrast threshold of the human eye.Journal of the Optical Society of America,36, 624–643.
Blake, R. (1989). A neural theory of binocular rivalry.Physiological Review,96, 145–167.
Blake, R.,&Fox, R. (1974). Binocular rivalry suppression: Insensitive to spatial frequency and orientation change.Vision Research,14, 687–692.
Burian, H. M., &VonNoorden, G. K. (1974).Binocular vision and ocular motility: Theory and management of strabismus. St Louis: Mosby.
Ciuffreda, K. J., Levi, D. M., &Selenow, A. (1991).Amblyopia: Basic and clinical aspects. Boston: Butterworth-Heinemann.
Duke-Elder, S., &Wybar, K. (1973).Systems of ophthalmology (Vol. 6). London: Kimpton.
Flynn, J. T. (1967). Spatial summation in amblyopia.Archives of Ophthalmology,78, 470–474.
Fox, R., &Check, R. (1966). Binocular fusion: A test of the suppression theory.Perception & Psychophysics,1, 331–334.
Fox, R., &Check, R. (1968). Detection of motion during binocular rivalry suppression.Journal of Experimental Psychology,78, 388–395.
Fox, R., Todd, S., &Bettinger, L. A. (1975). Optokinetic nystagmus as an objective indicator of binocular rivalry.Vision Research,15, 849–853.
Fuortes, M. G. F., Gunkel, R. D., &Rushton, W. A. H. (1961). Increment thresholds in a subject deficient in cone vision.Journal of Physiology,156, 179–192.
Graham, C. H., &Kemp, E. H. (1938). Brightness discrimination as a function of the duration of the increment in intensity.Journal of General Physiology,21, 635–650.
Grosvenor, T. (1957). The effects of duration and background luminance upon the brightness discrimination of an amblyope.American Journal of Optometry & Physiological Optics,34, 634–663.
Ham Asaki, D. I., &Flynn, J. T. (1981). Amblyopic eyes have longer reaction times.Investigative Ophthalmology & Vision Science,21, 846–853.
Harwerth, R. S., Boltz, R. L., &Smith, E. L., III (1980). Psychophysical evidence for sustained and transient channels in the monkey visual system.Vision Research,20, 15–22.
Harwerth, R. S., &Levi, D. M. (1978a). Reaction time as a measure of suprathreshold grating detection.Vision Research,18, 1579–1586.
Harwerth, R. S., &Levi, D. M. (1978b). A sensory mechanism for amblyopia: Psychophysical studies.American Journal of Optometry & Physiological Optics,55, 151–162.
Herrick, R. M. (1956). Foveal luminance discrimination as a function of the duration of the decrement or increment in luminance.Journal of Comparative Physiology & Psychology,49, 437–443.
Holopigian, K. (1989). Clinical suppression and binocular rivalry suppression: The effects of stimulus strength on the depth of suppression.Vision Research,29, 1325–1333.
Holopigian, K., Blake, R., &Greenwald, M. (1988). Clinical suppression and amblyopia.Investigative Ophthalmology & Vision Science,29, 444–451.
Hubel, D. H., Wiesel, T. N., &Le Vay, S. (1975). Functional architecture of area 17 in normal and monocularly deprived macaque monkeys.Cold Spring Harbor Symposium Proceedings,40, 581–589.
Humphriss, D. (1959). Refraction by the Humphriss immediate contrast method.Optician,138, 372–373.
Humphriss, D. (1960). Refraction by immediate contrast.Optician,139, 159–160.
Humphriss, D. (1963). The refraction of binocular vision.Ophthalmic Optician,3, 987–1001.
Humphriss, D. (1982). The psychological septum: An investigation into its function.American Journal of Optometry & Physiological Optics,59, 639–641.
Humphriss, D., &Woodruff, E. (1962). Refraction by immediate contrast.British Journal of Physiological Optics,19, 15–20.
Kalloniatis, M., &Harwerth, R. S. (1990). Spectral sensitivity and adaptation characteristics of cone mechanisms under white-light adaptation.Journal of the Optical Society of America A,7, 1912–1928.
Kalloniatis, M., &Harwerth, R. S. (1991). Effects of chromatic adaptation on opponent interactions in monkey increment-threshold spectral sensitivity functions.Journal of the Optical Society of America A,8, 1818–1831.
Keller, M. (1941). The relation between the critical duration and intensity in brightness discrimination.Journal of Experimental Psychology,28, 407–418.
Kohfeld, D. L., Santee, J. L., &Wallace, N. D. (1981a). Loudness and reaction time: I.Perception & Psychophysics,29, 535–549.
Kohfeld, D. L., Santee, J. L., &Wallace, N. D. (1981b). Loudness and reaction time: II. Identification of detection components at different intensities and frequencies.Perception & Psychophysics,29, 550–562.
Lehky, S. R. (1988). An astable multivibrator model of binocular rivalry.Perception,17, 215–228.
Levelt, W. J. M. (1965).On binocular rivalry. Soesterberg, The Netherlands: Institute for Perception RVO-TNO.
Levi, D. M., Harwerth, R. S., &Manny, R. E. (1979). Suprathreshold spatial frequency detection and binocular interaction in strabismic and anisometropic amblyopia.Investigative Ophthalmology & Vision Science,18, 714–725.
Loshin, D. S., &Jones, R. (1982). Contrast sensitivity as a function of exposure duration in the amblyopic visual system.American Journal of Optometry & Physiological Optics,59, 561–567.
Luce, R. D. (1986).Response times: Their role in inferring elementary mental organization. New York: Oxford University Press.
Mackenson, G. (1958). Reaktionszeitmessungen bei Amblyopie [Reaction time in amblyopia].Graefe’s Archives of Clinical & Experimental Ophthalmology,159, 636–648.
Mansfield, R. J. W. (1973). Latency functions in human vision.Vision Research,13, 2219–2234.
Miller, E. F. (1955). The nature and cause of impaired vision in the amblyopic eye of a squinter.American Journal of Optometry,32, 10–18.
Nygaard, R. W., &Frumkes, T. E. (1982). Calibration of the retinal illuminance provided by Maxwellian views.Vision Research,22, 433–434.
O’Shea, R. P. (1987). Chronometrie analysis supports fusion rather than suppression theory of binocular vision.Vision Research,21, 781–791.
O’Shea, R. P., &Crassini, B. (1981). The sensitivity of binocular rivalry suppression to changes in orientation assessed by reaction-time and forced-choice techniques.Perception,10, 283–293.
Piéron, H. (1914). Recherches sur les lois de variation des temps de latence sensorielle en fonction des intensités excitatrices [Research into the variation of sensory latency as a function of intensity].L’Année Physiologique,20, 17–96.
Piéron, H. (1920). Nouvelles recherches sur l’analyse du temps de latence sensorielle et sur la loi qui relie le temps à l’intensité d’excitation [New research on the analysis of sensory latency and how it varies with intensity].L’Année Physiologique,22, 58–142.
Pugh, M. (1954). Foveal vision in amblyopia.British Journal of Ophthalmology,38, 321–331.
Roufs, J. A. J. (1972). Dynamic properties of vision: I. Experimental relationships between flicker and flash thresholds.Vision Research,12, 261–278.
Schor, C. M., Landsman, L., &Erickson, P. (1987). Ocular dominance and the interocular suppression of blur in monovision.American Journal of Optometry A Physiological Optics,64, 723–730.
Schor, C. M., Terrell, M., &Peterson, D. (1976). Contour interaction and temporal masking in strabismus and amblyopia.American Journal of Optometry & Physiological Optics,53, 217–223.
Shimojo, S., Bauer, J., O’connell, K. M., &Held, R. (1986). Prestereopic binocular fusion in infants.Vision Research,26, 501–510.
Simpson, T. (1991). The suppression effect of simulated anisometropia.Ophthalmic & Physiological Optics,11, 350–358.
Simpson, T. (1992). Monocular acuity in the presence and absence of fusion.Optometry & Vision Science,69, 405–410.
Simpson, T., Smith, E. L., III,Harwerth, R. S., &Kalloniatis, M. (1990). Spectral sensitivity of induced anisometropic suppression.Investigative Ophthalmology & Vision Science (Suppl.),31, 94.
Ueno, T. (1977). Reaction time as a measure of temporal summation at suprathreshold levels.Vision Research,17, 227–232.
Ueno, T. (1978). Temporal summation in human vision: Simple reaction time measurements.Perception & Psychophysics,23, 43–50.
Von Noorden, G. K. (1961). Reaction time in normal and amblyopic eyes.Archives of Ophthalmology,66, 695–701.
Von Noorden, G. K., &Leffler, M. B. (1966). Visual acuity in strabismus amblyopia under monocular and binocular conditions.Archives of Ophthalmology,76, 172–177.
Wales, R., &Fox, R. (1970). Increment detection thresholds during binocular rivalry suppression.Perception & Psychophysics,8, 90–94.
Walker, P. (1975). Stochastic properties of binocular rivalry alternations.Perception & Psychophysics,18, 467–473.
Watson, A. B. (1986). Temporal sensitivity. InK. R. Boff, L. Kaufman, & J. P. Thomas (Eds.),Handbook of perception and human performance (pp. 6-1 to 6-43). New York: Wiley. or]Weber, A. I. (1988).Ricco’s area and resolution in the human visual system. Unpublished master’s thesis, University of Houston.
Wolfe, J. M., &Owens, D. A. (1979). Evidence for separable binocular processes differentially affected by artificially induced anisometropia.American Journal of Optometry & Physiological Optics,56, 279–284.
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This work was supported, in part, by National Health and Medical Research Council Grant 950607 and by a Special Initiatives Grant (from the University of Melbourne) to M.K.
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Planta, M.J., Kalloniatis, M. Characteristics of anisometropic suppression: Simple reaction time measurements. Perception & Psychophysics 60, 491–502 (1998). https://doi.org/10.3758/BF03206869
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DOI: https://doi.org/10.3758/BF03206869