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Intraoperative Measurement of Crystalline Lens Diameter in Living Humans
Daisuke Nagase1, Junsuke Akura2, Yutaka Omatsu1
1Division of Ophthalmology and Visual Science, Department of Medicine of Sensory and Motor Organs, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan.
Yonago Acta Medica
|February 28, 2022
Summary
Accurate measurement of the living human eye's lens equatorial diameter is now possible using a novel surgical device. This new method reveals longer lens diameters than previously reported and suggests difficulty in estimating them from preoperative parameters.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Ophthalmic Surgery
Background:
- Accurate measurement of the living human lens equatorial diameter is not well-established.
- Previous methods for estimating lens dimensions have limitations.
Purpose of the Study:
- To measure the lens equatorial diameter of the living human eye during cataract surgery using a novel device.
- To investigate the correlation between measured lens equatorial diameter and preoperative parameters.
Main Methods:
- The equatorial diameter of the lens was measured in 24 eyes during cataract surgery using a loop-shaped device.
- Correlations were analyzed between the measured diameter and preoperative parameters obtained from CASIA2® imaging.
Main Results:
- The average measured lens equatorial diameter was 10.5 ± 0.4 mm, differing significantly from CASIA2® estimations (10.1 ± 0.7 mm).
- A positive correlation was found between lens equatorial diameter and anterior chamber depth (ACD) and anterior chamber width (ACW).
- No significant correlation was observed with other preoperative parameters.
Conclusions:
- A novel surgical device allows for accurate measurement of the living human lens equatorial diameter without complications.
- Measured lens equatorial diameters were longer than previously reported values.
- Estimating lens equatorial diameter from preoperative parameters remains challenging, but this research aids accommodative intraocular lens development.
