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Accommodative changes in anterior chamber depth in patients with high myopia
Boris E Malyugin1, Alexander A Shpak, Dmitry F Pokrovskiy
1Cataract Surgery Department, S. Fyodorov Eye Microsurgery Complex-Federal State Institution, Moscow, Russian Federation.
Journal of Cataract and Refractive Surgery
|July 21, 2012
Summary
High myopia patients show reduced accommodative changes in anterior chamber depth (ACD) compared to emmetropic individuals. However, some myopic eyes may develop critically shallow anterior chambers during accommodation, impacting surgical planning.
Area of Science:
- Ophthalmology
- Anterior Segment Imaging
- Refractive Error Correction
Background:
- High myopia presents unique challenges for refractive correction.
- Understanding ocular biomechanics during accommodation is crucial for surgical planning.
Purpose of the Study:
- To investigate accommodative changes in central anterior chamber depth (ACD) in high myopia patients.
- To compare these changes with those in emmetropic individuals using anterior segment optical coherence tomography (AS-OCT).
Main Methods:
- A prospective case-control study was conducted.
- Anterior chamber depth (ACD) was measured using Visante AS-OCT in non-accommodative and accommodative states.
- Thirty-six high myopic eyes and 31 emmetropic eyes were analyzed.
Main Results:
- Accommodative ACD changes were significantly less pronounced in high myopia (-0.14 mm) versus emmetropia (-0.22 mm).
- Ten myopic patients exhibited critically shallow anterior chambers (ACD <2.8 mm) during accommodation.
- Baseline ACD was similar between groups.
Conclusions:
- Eyes with high myopia exhibit reduced accommodative response in ACD compared to emmetropic eyes.
- The risk of critically shallow anterior chambers during accommodation in myopic eyes necessitates consideration for phakic intraocular lens implantation.
- These findings are vital for safe and effective surgical correction of high myopia.
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