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KMID : 0360220080490010158
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Journal of the Korean Ophthalmological Society
2008 Volume.49 No. 1 p.158 ~ p.163
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Normal Distance Stereoacuity by Age Assessed by the Frisby Davis Distance Stereotest
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Kim Sung-Jae
Kim Sook-Young
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Abstract
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Purpose : To determine the range of normal distance stereoacuity in populations with normal vision and the
change of distance stereoacuity with age using the Frisby Davis Distance (FD2) stereotest and to evaluate the
influence of monocular cues on the FD2 test.
Methods : Ninety-eight subjects between 4 and 73 years old who had no ocular or neurologic diseases were
examined. Distance stereoacuity was measured binocularly and monocularly with the FD2 test.
Results : According to the results of the FD2 test, the mean distance stereoacuity of patients was 14.74±6.02
sec of arc. The monocular threshold with the dominant eye was 182.09±58.13 sec of arc. Subjects between
21 and 30 years old showed the best distance stereoacuity of 10.67±3.20 sec of arc. A significant decline in
distance stereoacuity and monocular threshold were seen in subjects older than 61 (p<0.001).
Conclusion : The normal distance stereoacuity using the FD2 was 14.74±6.02 sec of arc, and significant
reductions of stereoacuity and monocular threshold were seen in subjects older than 61. Therefore, we have
to consider the effect of age on stereoacuity when performing the FD2 test. To take monocular cues into
account, the FD2 test should be performed under both binocular and monocular conditions.
J Korean Ophthalmol Soc 49(1):158-163, 2008
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KEYWORD
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Distance Stereoacuity, FD2 stereotest
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