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A method for profiling biometric changes during disaccommodation.

Alison Alderson¹, Leon N Davies, Edward A H Mallen

¹Bradford School of Optometry and Vision Science, University of Bradford, Bradford, West Yorkshire, UK.

Optometry and Vision Science : Official Publication of the American Academy of Optometry

|April 3, 2012

Summary

This summary is machine-generated.

Low-coherence reflectometry with the LenStar device can profile eye biometric changes after near tasks. Soft contact lenses do not significantly affect these measurements, validating their use in studying myopia.

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Area of Science:

Ophthalmology
Biomedical Optics
Physiological Optics

Background:

Near work can induce transient myopia.
Understanding ocular biometric changes during disaccommodation is crucial.
Low-coherence reflectometry offers a non-invasive method for ocular measurements.

Purpose of the Study:

To apply low-coherence reflectometry to study human eye biometric changes during disaccommodation after near tasks.
To evaluate the impact of soft contact lenses on these biometric measurements.

Main Methods:

Ocular biometric parameters, including crystalline lens thickness (LT) and anterior chamber depth (ACD), were measured using the LenStar device.
Participants underwent a 5 D accommodative task, followed by post-task measurements.
Accommodation responses were recorded, and biometric data were interleaved to profile anterior segment changes.

Main Results:

Increased LT and reduced ACD were observed during the accommodative task.
A time-dependent profile of LT and ACD changes was documented post-task.
Soft contact lens wear did not significantly alter LenStar measurements of ACD or LT.

Conclusions:

The LenStar instrument, with stimulus modification, can profile post-task changes in LT and ACD.
The system's resolution is adequate for investigating nearwork-induced transient myopia biometrically.
LenStar measurements of ACD and LT are reliable even with soft contact lens wear.