Infant grating acuity is temporally tuned

Sokol, Samuel; Moskowitz, Anne; McCormack, Glen; Augliere, Reed A.

doi:10.1016/0042-6989(88)90067-3

Cited by 29 publications

(17 citation statements)

References 22 publications

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“…Snellen acuity), researchers compared sVEP acuity with tests of behavioral visual acuity, which both measure grating acuity. Sokol et al. (1988) compared preferential looking (PL) acuity (for stationary and for phase alternating gratings) with sVEP acuity in a group of infants between the age of 2 and 10 months.…”

Section: Sweep Vep Validitymentioning

confidence: 99%

The technique, validity and clinical use of the sweep VEP

Almoqbel

Leat

Irving

2008

Ophthalmic Physiologic Optic

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Vision scientists have concentrated on studying two visual functions when it comes to assessing the sensory visual development in human: visual acuity and contrast sensitivity. The methods used to measure these visual functions can be either behavioral or electrophysiological. A relatively new technique for measuring the visual acuity and contrast sensitivity electrophysiologically is the sweep visual evoked potential (sVEP). This paper is a review of the literature on the sVEP technique: stimulus parameters, threshold determination, validity and reliability of sVEP are discussed. Different studies using the sVEP to study the development of visual acuity, contrast sensitivity, and vernier acuity are presented. Studies have demonstrated that the sVEP is a potentially important tool for assessing visual acuity and contrast sensitivity in non-verbal individuals with disorders affecting their visual system.

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Section: Sweep Vep Validitymentioning

confidence: 99%

The technique, validity and clinical use of the sweep VEP

Almoqbel

Leat

Irving

2008

Ophthalmic Physiologic Optic

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“…The recording duration could be as short as 10 seconds. However, little is known of the effects of sweep duration on the VA or contrast threshold, which ranged from 10 to 20 seconds in most of the studies reporting sVEP threshold measurements [4,12,[36][37][38]. There is only one study [39] that has actually investigated the effect of sweep duration, and this used the sVEP VA as the outcome.…”

Section: Introductionmentioning

confidence: 98%

Effects of sweep VEP parameters on visual acuity and contrast thresholds in children and adults

Almoqbel

Yadav

Leat

et al. 2010

Graefes Arch Clin Exp Ophthalmol

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A temporal frequency of 7.5 Hz, a stimulus area of 4° or larger for VA and 10° or larger for contrast thresholds, and the use of a fixation target gave more viable readings, and may be indicated for future application. Consideration of the number of viable readings showed more differences between parameters than the actual thresholds, and it is suggested that more readings presumably would yield more reliable threshold measurements.

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“…For general assessment of spatial and temporal contrast sensitivities, many studies have applied adaptive procedures (Cornsweet, 1962; Levitt, 1971; von Bekesy, 1947; Watson & Pelli, 1983; Wetherill & Levitt, 1965; for reviews, see Treutwein, 1995; Leek, 2001) to measure grating acuity or the critical fusion frequency (Birch, Stager, & Wright, 1986; Harmening, Nikolay, Orlowski, & Wagner, 2009; Sokol, Moskowitz, McCormack, & Augliere, 1988; Tyler, 1985, 1991; Vassilev, Ivanov, Zlatkova, & Anderson, 2005; Vianya, Douthwaite, & Elliott, 2002; Zlatkova, Vassilev, & Anderson, 2008). These single points on the high cutoff of spatial or temporal CSFs have traditionally been measured by fixing a high grating contrast (50 or 100%), while adaptively adjusting the stimulus on the frequency dimension (von Bekesy, 1947).…”

Section: Introductionmentioning

confidence: 99%

Bayesian adaptive estimation of the contrast sensitivity function: The quick CSF method

Lesmes

Lü

Baek

et al. 2010

JOV

292

449

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The contrast sensitivity function (CSF) predicts functional vision better than acuity, but long testing times prevent its psychophysical assessment in clinical and practical applications. This study presents the quick CSF (qCSF) method, a Bayesian adaptive procedure that applies a strategy developed to estimate multiple parameters of the psychometric function (A. B. Cobo-Lewis, 1996; L. L. Kontsevich & C. W. Tyler, 1999). Before each trial, a one-step-ahead search finds the grating stimulus (defined by frequency and contrast) that maximizes the expected information gain (J. V. Kujala & T. J. Lukka, 2006; L. A. Lesmes et al., 2006), about four CSF parameters. By directly estimating CSF parameters, data collected at one spatial frequency improves sensitivity estimates across all frequencies. A psychophysical study validated that CSFs obtained with 100 qCSF trials (~10 min) exhibited good precision across spatial frequencies (SD < 2–3 dB) and excellent agreement with CSFs obtained independently (mean RMSE = 0.86 dB). To estimate the broad sensitivity metric provided by the area under the log CSF (AULCSF), only 25 trials were needed to achieve a coefficient of variation of 15–20%. The current study demonstrates the method’s value for basic and clinical investigations. Further studies, applying the qCSF to measure wider ranges of normal and abnormal vision, will determine how its efficiency translates to clinical assessment.

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Infant grating acuity is temporally tuned

Cited by 29 publications

References 22 publications

The technique, validity and clinical use of the sweep VEP

The technique, validity and clinical use of the sweep VEP

Effects of sweep VEP parameters on visual acuity and contrast thresholds in children and adults

Bayesian adaptive estimation of the contrast sensitivity function: The quick CSF method

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