Letter | Published:

Eye Movements During Monocular Fixation

Nature volume 162, pages 2526 (03 July 1948) | Download Citation



A METHOD of recording small eye movements during monocular fixation has been described by one of us1, in which a beam of ultra-violet radiation (λ = 3650 A.) is incident on the cornea in such a direction that the fraction of the light transmitted through the cornea falls on the subject‘s blind spot when some test object is fixated by the illuminated eye ; the subject is then, in effect, only aware of the fixation target. Part of the radiation, however, is reflected at the cornea ; this reflected beam strikes a half-aluminized mirror and is there divided so that one part falls on a vertical straight edge and the other on a horizontal one. In each case, more or less of the radiation passes the straight edge as the eye moves, the fraction passed being focused on to an electron multiplier photocell. The output of each multiplier is amplified and fed to a cathode ray oscillograph, the time base of which is suppressed. The two oscillograph beams are in this way arranged to give vertical traces only, which are photographed simultaneously on a continuously moving film travelling in the horizontal direction. The eye movements can then be deduced from the two records on the film. The system is sufficiently sensitive to detect eye movements of 1 minute of arc ; deflexions due to noise from the multipliers do not, in general, correspond to more than half a minute of arc.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1.

    , Proc. Phys. Soc. (in course of publication).

  2. 2.

    , Nature, 161, 154 (1948).

  3. 3.

    and , Arch. Ophthalmol., 12, 475 (1934).

  4. 4.

    and , J. Opt. Soc. Amer., 37, 217 (1947).

Download references

Author information


  1. Technical Optics Section, Imperial College of Science and Technology, London, S.W.7. March 12.

    • MARY P. LORD
    •  & W. D. WRIGHT


  1. Search for MARY P. LORD in:

  2. Search for W. D. WRIGHT in:

About this article

Publication history





By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.