My Graduation Research 2012-2013 Testability of preschool children on stereotests used to screen vision disorders

Testability of preschool children on stereotests used to screen vision disorders 

Abstract

Purpose:

The purpose of this study is to detect testability of preschool children aged from 3 to 5 years using the Random Dot E Stereotest, Randot Stereo Smile test and Randot Preschool Stereotest.

Methods:

A total of 163 children from King Abdulaziz Military Academy preschool and the Special Security Forces preschool. Strabismic children, as determined by cover test at distance and near, were excluded from this study. Stereopsis was tested on each using each of the three tests in a variable, balanced order. A child’s testability for each test was determined by the ability to complete the nonstereo task (pretest) and the gross stereo task for each stereotest.

Results:

Testability of children on the pretest was greater for the Stereo Smile test (100%) than for the Random Dot E test (97%; p=0.05) or the Randot Preschool test (92%; p=0.00021) and there was significant difference between the Random Dot E test and the Randot Preschool test (p=0.05). For all children, testability on the gross stereo task was greater for the Stereo Smile (98%; p=0.001) and Random Dot E (90%; p= 0.01) tests than for the Randot Preschool test (80%) and there was significant difference between the Stereo Smile and Random Dot E tests (p=.0006). There were significant differences among the proportion of children able to complete the gross-stereo task and those testable for the Random Dot E (p=0.012) and Randot Preschool (p=0.002), but there was no significant difference among those able to complete the gross stereo smile test (p=0.15).

Conclusions:

Among preschoolers aged 3 years through 5 years, testability differs significantly across the three commercially available random dot stereotests evaluated. The results suggest that two-choice procedures (Random Dot E and stereo smile test)  increase testability of preschool children, the child testability on the Random Dot E stereotest was significantly better for older than younger preschool-age children, while stereo smile test is the best for young preschoolers .

Keywords:

Stereoacuity, Stereopsis, Vision Disorders, Teatability, Preschool children.