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    Updated computer-animated model elevates understanding of accommodation, presbyopia

    Concept proposes new classification of zonular architecture based on structure, function



    A new version of a model of the mechanism of accommodation—showing how anatomic structures interconnect—enhances understanding of zonular architecture.



    Philadelphia—Aided by an updated version of a computer-animated model of the mechanism of accommodation (CAMA 2.0), Daniel B. Goldberg, MD, FACS, has proposed a new classification of zonular architecture based on structure and function.

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    Dr. Goldberg, clinical associate professor of ophthalmology, Drexel College of Medicine, Philadelphia, introduced his first computer-animated model of accommodation in 2011 and presented the new version earlier this year. The model—based on anatomy, biometry, endoscopy, and video ultrabiomicroscopy—represents a biometrically accurate model of a 25-year-old eye with 8 D of accommodation.

    Motivating factor

    The driving force of this work over the past 5 years has been to find a cure for presbyopia, a goal that first motivated Dr. Goldberg to work on an improved accommodating IOL.

    While studying the mechanics involved, Dr. Goldberg said he realized that the function of the zonules in accommodating the lens was poorly understood. The more he learned about the network of fibers, the more he grasped that words and pictures were inadequate to explain the new anatomical findings. Dr. Goldberg said he concentrated instead on creating an animated model of the elements of the zonules and the movements of the extralenticular tissues.

    Figure 1. CAMA 2.0 composite model showing the eye in accommodation (right half) and disaccommodation (left half).










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