Abstract

Exact knowledge of binocular coordination in human subjects has been obtained largely with the head held erect and with the fixation point symmetrically placed before the eyes in a horizontal plane. Rotational responses (vergences and versions) have been assumed to correspond with the rotational stimuli. The exceptions to these restrictions are reviewed.

A tilting haploscope has been designed and constructed which differs from other haploscopes previously described in that: (1) it enables one to tilt the plane of regard (the plane containing the centers of rotation of the two eyes and the fixation point) about the base line (the line connecting the centers of rotation of the two eyes); (2) the subjects head can be tilted about the base line; and (3) a means of recording rotational responses is provided.

The optical and mechanical features are described as well as the method of positioning the subject’s head.

Preliminary results using five subjects suggest that the ACA ratio decreases when the plane of regard is elevated, and that the ACA is not effected by the tilt of the head. Rotation of the eye lags the stimulus increasingly as the stimulus is moved peripherally with maximum values up to approximately 12 deg.

© 1959 Optical Society of America

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References

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  1. H. W. Hofstetter, Am. J. Optom. and Arch. Am. Acad. Optom. 22, 301–333 (1945).
    [Crossref]
  2. M. J. Allen, Am. J. Optom. and Arch. Am. Acad. Optom. 36, 297–307 (1954).
    [Crossref]
  3. A. Ames and G. H. Gliddon, A. M. A. Trans. Sec. Opthalnol. 26, 102–175 (1928).
  4. W. Schmiedt, Arch. Opthhalmol. Graefe’s 39, 233–256 (1893).
  5. K. M. Ogle, Researches in Binocular Vision (W. B. Saunders Company, Philadelphia, 1956), pp. 200–221.

1954 (1)

M. J. Allen, Am. J. Optom. and Arch. Am. Acad. Optom. 36, 297–307 (1954).
[Crossref]

1945 (1)

H. W. Hofstetter, Am. J. Optom. and Arch. Am. Acad. Optom. 22, 301–333 (1945).
[Crossref]

1928 (1)

A. Ames and G. H. Gliddon, A. M. A. Trans. Sec. Opthalnol. 26, 102–175 (1928).

1893 (1)

W. Schmiedt, Arch. Opthhalmol. Graefe’s 39, 233–256 (1893).

Allen, M. J.

M. J. Allen, Am. J. Optom. and Arch. Am. Acad. Optom. 36, 297–307 (1954).
[Crossref]

Ames, A.

A. Ames and G. H. Gliddon, A. M. A. Trans. Sec. Opthalnol. 26, 102–175 (1928).

Gliddon, G. H.

A. Ames and G. H. Gliddon, A. M. A. Trans. Sec. Opthalnol. 26, 102–175 (1928).

Hofstetter, H. W.

H. W. Hofstetter, Am. J. Optom. and Arch. Am. Acad. Optom. 22, 301–333 (1945).
[Crossref]

Ogle, K. M.

K. M. Ogle, Researches in Binocular Vision (W. B. Saunders Company, Philadelphia, 1956), pp. 200–221.

Schmiedt, W.

W. Schmiedt, Arch. Opthhalmol. Graefe’s 39, 233–256 (1893).

A. M. A. Trans. Sec. Opthalnol. (1)

A. Ames and G. H. Gliddon, A. M. A. Trans. Sec. Opthalnol. 26, 102–175 (1928).

Am. J. Optom. and Arch. Am. Acad. Optom. (2)

H. W. Hofstetter, Am. J. Optom. and Arch. Am. Acad. Optom. 22, 301–333 (1945).
[Crossref]

M. J. Allen, Am. J. Optom. and Arch. Am. Acad. Optom. 36, 297–307 (1954).
[Crossref]

Arch. Opthhalmol. Graefe’s (1)

W. Schmiedt, Arch. Opthhalmol. Graefe’s 39, 233–256 (1893).

Other (1)

K. M. Ogle, Researches in Binocular Vision (W. B. Saunders Company, Philadelphia, 1956), pp. 200–221.

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Figures (4)

F. 1
F. 1

Lines, planes, and angles used to specify the direction of regard.

F. 2
F. 2

Over-all view of the research tilting haploscope. The base yoke supports the upper and lower yokes at their ends. The upper yoke carries the optical assemblies. The subject is positioned accurately by means of the bite assembly attached to the lower yoke. The switches on the base yoke control the azimuth motors.

F. 3
F. 3

Bite assembly and bite plate without a wax covering. The bite assembly is attached firmly to the head tilt yoke.

F. 4
F. 4

Detail view of the azimuth axes, gears, scales, and drive motors. Note also the threaded studs in the vertical slots in the vertical brackets. These carry the objectives which image the subject’s pupils in the focal planes of the azimuth eyepieces.