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Impressum
Biomechanical stretch experiments of the lens-zonula-ciliary body apparatus
Koopmans S., Terwee T.
Department of Ophtalmology, University of Groningen
Purpose: to investigate relationships between age, lens thickness,
lens diameter and lens focal length change during radial stretch of human
donor lenses.
Methods: human donor lenses were radially stretched in a mechanical
stretch apparatus simulating accommodation. Simultaneously lens focal
length, lens thickness and lens diameter were measured.
Results: during stretch lens focal length decreased, lens diameter
increased and lens thickness decreased. Older lenses showed less focal
length changes then younger lenses.
Conclusion: accommodative changes can be modelled and studied in
human donor lenses. The results are in agreement with theories which explain
presbyopia by decrease of lens elasticity.