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Related Experiment Videos

Iris transillumination defect and microhyphema syndrome.

S H Johnson, R P Kratz, P F Olson

    Journal - American Intra-Ocular Implant Society
    |January 1, 1984
    PubMed
    Summary
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    A delayed complication of sulcus-fixated posterior chamber lenses can cause iris transillumination defects and visually significant microhyphemas. This condition, affecting 5-15% of patients, requires ophthalmologist awareness for proper diagnosis and management.

    Area of Science:

    • Ophthalmology
    • Medical Devices
    • Complication Studies

    Background:

    • Sulcus-fixated posterior chamber intraocular lenses (IOLs) with specific haptic designs can lead to delayed complications.
    • Iris transillumination defects and microhyphemas represent potential adverse events associated with these IOLs.

    Purpose of the Study:

    • To describe a previously undocumented delayed complication of sulcus-fixated posterior chamber lenses.
    • To identify the clinical signs, incidence, and potential sequelae of this complication.

    Main Methods:

    • Retrospective case series analysis of 41 eyes with sulcus-fixated posterior chamber lenses.
    • Clinical examination to identify iris transillumination defects and microhyphemas.
    • Estimation of complication incidence within the patient population.

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    Main Results:

    • A complication characterized by crescent-shaped iris transillumination defects overlying lens haptics was observed.
    • Eight eyes (approximately 19.5% of the affected eyes) experienced visually significant microhyphemas.
    • Estimated incidence of transillumination defects: 5-15%; incidence of lens-induced hemorrhage: >1%.

    Conclusions:

    • Sulcus-fixated posterior chamber lenses with elliptical polypropylene haptics and anterior angulation can cause delayed iris complications.
    • Ophthalmologists must be aware of these transillumination defects and microhyphemas when evaluating patients with these IOLs presenting with visual disturbances.