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Published on: February 23, 2018
Free-space accommodative response and minus lens-induced accommodative response in pre-school children
1Department of Optometry, Faculty of Allied Health Sciences, National University of Malaysia, Kuala Lumpur, Malaysia.
Optometry (St. Louis, Mo.)
|August 26, 2004
Summary
Preschool children exhibit better accommodative accuracy with free-space visual stimuli compared to minus lens-induced stimuli. This finding highlights differences in how young children focus their vision under varying conditions.
Area of Science:
- Ophthalmology
- Pediatric Optometry
- Visual Science
Background:
- Accurate accommodation is crucial for clear vision, especially in developing visual systems.
- Understanding accommodative responses in preschool children is vital for early detection of visual anomalies.
Purpose of the Study:
- To compare the accommodative accuracy of preschool children under two distinct stimulus conditions.
- Investigate differences between free-space and minus lens-induced accommodative stimuli in young children.
Main Methods:
- Objective measurement of accommodative responses in 59 children aged 2-5 years using a Canon Autoref R-1.
- Stimuli included a 1 D free-space target at 100 cm and a -1.00 D lens inducing a distant target stimulus.
Main Results:
- Mean accommodative lag was 0.24 D for free-space stimulus and 0.69 D for minus lens stimulus.
- Accommodative response lag was significantly lower with the free-space stimulus.
Conclusions:
- Preschool children demonstrate superior accommodative accuracy with free-space stimuli.
- Minus lens-induced stimuli result in a greater accommodative lag in this age group.
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