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Simulating the Mechanics of Lens Accommodation via a Manual Lens Stretcher
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Dynamic refraction and anterior segment OCT biometry during accommodation
Heather Durkee1,2, Marco Ruggeri1,2, Leana Rohman1,2
1Ophthalmic Biophysics Center, Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, 1638 NW 10 Ave, Miami, Florida 33136, USA.
Biomedical Optics Express
|June 10, 2024
Summary
Researchers developed a new instrument to continuously measure how the eye
Area of Science:
- Ophthalmology and Vision Science
- Biomedical Engineering
Background:
- Eye accommodation involves changes in crystalline lens shape to alter focus.
- Previous research quantified lens shape and accommodation mainly at static states.
- A continuous, dynamic measurement of accommodation is needed.
Purpose of the Study:
- To present an instrument for continuous measurement of lens shape and optical power during accommodation.
- To correlate dynamic changes in ocular dimensions with changes in refractive power.
Main Methods:
- Combined autorefractor, visual fixation target, and optical coherence tomography (OCT).
- OCT imaged the anterior segment and measured ocular distances.
- Collected dynamic measurements of ocular dimensions and refraction.
Main Results:
- Presented dynamic accommodative responses from three human subjects.
- Analyzed individual responses to correlate ocular power changes with dimensional changes.
- Demonstrated continuous measurement of accommodation-related changes.
Conclusions:
- The developed instrument enables continuous dynamic assessment of eye accommodation.
- Correlated ocular dimension changes with optical power shifts during accommodation.
- Provides a novel method for studying the mechanisms of visual focus.
