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Related Experiment Videos

Refractive keratoplasty with hydrogel implants in primates.

S B Koenig, T Hamano, T Yamaguchi

    Ophthalmic Surgery
    |March 1, 1984
    PubMed
    Summary

    Intrastromal hydrogel lens implantation in primate corneas did not increase curvature or refractive power. Postoperative optical clarity was achieved in most eyes, but the technique failed to induce the desired refractive change.

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    Area of Science:

    • Ophthalmology
    • Biomaterials Science
    • Corneal Surgery

    Background:

    • Hydrogel lenses have been explored for refractive correction.
    • Intrastromal implantation aims to alter corneal curvature without lamellar resection.

    Purpose of the Study:

    • To evaluate the refractive outcome of intrastromal hydrogel lens implantation in primate corneas.
    • To assess the histological response to hydrogel lenses placed in intrastromal pockets.

    Main Methods:

    • Hydrogel lenses were implanted into intrastromal pockets in primate corneas.
    • Relaxing incisions in Bowman's layer preceded implantation in some cases.
    • Histological examination assessed corneal tissue response and implant integration.

    Main Results:

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    • Posterior corneal lamellar protrusion into the anterior chamber was observed histologically.
    • No increase in anterior corneal curvature or refractive power was achieved.
    • Six of seven eyes maintained optical clarity eight months postoperatively.

    Conclusions:

    • Intrastromal hydrogel lens implantation without lamellar removal does not induce significant refractive change.
    • The technique may result in corneal structural changes but can maintain optical clarity.
    • Further research is needed to optimize hydrogel lens designs and implantation techniques for refractive modification.