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Observation of Ciliary Body Changes during Accommodation Using Anterior OCT
Mahmoud Mohamed Farouk1,2, Takeshi Naito1, Kayo Shinomiya1
1The Department of Ophthalmology, Tokushima University Graduate School of Biomedical Sciences.
The Journal of Medical Investigation : JMI
|March 30, 2018
Summary
Ciliary body thickness changes during accommodation in children. The anterior ciliary body thickens, while the posterior portion thins, suggesting circular muscle involvement in focusing.
Area of Science:
- Ophthalmology
- Anatomy
- Physiology
Background:
- Accommodation is crucial for clear vision in children.
- Understanding ciliary body (CB) dynamics during accommodation is key to pediatric eye health.
- Anterior segment optical coherence tomography (OCT) offers high-resolution imaging of ocular structures.
Purpose of the Study:
- To investigate anatomical changes in the pediatric ciliary body (CB) during natural accommodation.
- To utilize anterior segment optical coherence tomography (OCT) for precise measurements.
Main Methods:
- Prospective observational study of 9 children (18 eyes) aged 4-10 years.
- Ciliary body thickness (CBT) measured temporally using anterior segment OCT at 1, 2, and 3 mm posterior to the scleral spur.
- Measurements compared between accommodated and unaccommodated (cycloplegic) states.
Main Results:
- Mean CBT significantly increased at 1 mm posterior to the scleral spur (751±42 to 818±40 μm, P<0.001) during accommodation.
- Mean CBT significantly decreased at 2 mm (506±66 to 445±59 μm, P<0.001) and 3 mm (290±54 to 240±50 μm, P<0.001).
Conclusions:
- Accommodation in children involves thickening of the anterior ciliary body and thinning of the posterior portion.
- Findings suggest primary involvement of circular ciliary muscles in the accommodative process.
- This study provides insights into the biomechanics of pediatric accommodation.
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