Effects of stimulus vergence on mean accommodation response, microfluctuations of accommodation and optical quality of the human eye

This study was carried out on three observers by means of a highly sensitive infra-red optometer, the principle of which is recalled, associated with other measurement techniques. We found the accommodative "resting position" to coincide with minimum astigmatic ocular aberration, but not necessarily with maximum ocular optical quality, as suggested by Johnson. The amplitude of accommodation microfluctuations appears to vary in opposite directions with ocular optical quality; this result agrees with previous findings of Arnulf et al. The power spectrum of accommodation micrfluctuations we recorded ranged in frequency from 0 to 6 Hz. A relative activity maximum appears in the 1 to 6 Hz bandwidth for the "resting position" or the optimal quality position. We used Toates' s accommodation model as a frame of reference to interpret these results.

[1]  G. Westheimer,et al.  Fluctuations of accommodation under steady viewing conditions , 1959, The Journal of physiology.

[2]  Jacques Simon,et al.  Optometre enregistreur des microfluctuations d'accommodation , 1977, Vision Research.

[3]  Meredith W. Morgan,et al.  ACCOMMODATION AND ITS RELATIONSHIP TO CONVERGENCE , 1944 .

[4]  M Millodot,et al.  Influence of accommodation on the chromatic aberration of the eye. , 1973, The British journal of physiological optics.

[5]  M. Françon,et al.  Diffraction. Structure des images - Influence de la coherence de la lumiere , 1970 .

[6]  Yves le Grand,et al.  Form and Space Vision , 1967 .

[7]  W. N. Charman,et al.  Dependence of accommodation response on the spatial frequency spectrum of the observed object , 1977, Vision Research.

[8]  M. Millodot,et al.  Effet des microfluctuations de l'accommodation sur l'acuite visuelle , 1968 .

[9]  H W Leibowitz,et al.  Night myopia and the intermediate dark focus of accommodation. , 1975, Journal of the Optical Society of America.

[10]  G. Heath,et al.  The influence of visual acuity on accommodative responses of the eye. , 1956, American journal of optometry and archives of American Academy of Optometry.

[11]  G WESTHEIMER,et al.  Dynamics of accommodation responses of the human eye , 1960, The Journal of physiology.

[12]  F. Campbell,et al.  Correlation of accommodation between the two eyes. , 1960, Journal of the Optical Society of America.

[13]  F. Toates,et al.  Accommodation function of the human eye. , 1972, Physiological reviews.

[14]  Rainer Röhler,et al.  Zur messung der modulationsübertragungsfunktion des lebenden menschlichen auges im reflektierten licht , 1969 .

[15]  G. J. van der Wildt,et al.  The Effect of Anticipation on the Transfer Function of the Human Lens System , 1974 .

[16]  C. Johnson,et al.  Effects of luminance and stimulus distance on accommodation and visual resolution. , 1976, Journal of the Optical Society of America.

[17]  Françoise Berny.  Etude de la formation des images retiniennes et determination de l'aberration de sphericite de l'oeil humain , 1969 .

[18]  W N Charman,et al.  Accommodation as a Function of Object Form , 1978, American journal of optometry and physiological optics.

[19]  J Bescos,et al.  A cinematographic method for the dynamic study of the image formation by the human eye. Microfluctuations of the accommodation , 1981 .