Fern K D, Manny R E, Burghart C
College of Optometry, University of Houston, TX 77204-6052.
J Am Optom Assoc. 1994 Sep;65(9):651-9.
Resistance to occlusion and fix and follow are often used to make inferences about the acuity of young children. In this study, the acuity of 6- to 12-month-old infants was degraded monocularly to elicit resistance to occlusion or loss of fixation.
Occlusion foils and optical blur were used to simulate monocular acuity reduction. Two different targets, a mechanical rabbit and a "flickering" light were used for fixation.
More infants resisted occlusion when viewing the rabbit than the light. Resistance to occlusion was observed in the majority of infants when acuity was degraded to the level expected for 6 to 12-month-old infants (20/80-20/300).
The sensitivity of resistance to occlusion is influenced by the test target and if an interesting target is used, resistance to occlusion may be a useful tool for detecting interocular acuity differences in 6- to 12-month-old infants.
抗拒遮盖以及注视和跟随情况常被用于推断幼儿的视力敏锐度。在本研究中，对6至12个月大婴儿的单眼视力进行降低，以引发其对遮盖的抗拒或注视丧失。
使用遮盖箔片和光学模糊来模拟单眼视力下降。使用两种不同的目标，即机械兔子和“闪烁”光来进行注视。
与注视光相比，更多婴儿在观看兔子时抗拒遮盖。当视力下降到6至12个月大婴儿预期的水平（20/80 - 20/300）时，大多数婴儿出现了对遮盖的抗拒。
对遮盖的抗拒敏感性受测试目标的影响，如果使用有趣的目标，对遮盖的抗拒可能是检测6至12个月大婴儿两眼间视力差异的有用工具。
