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    Bowman layer transplantation effective in advanced keratoconus


    Out of the 22 transplantations, two resulted in complications. In both of these, the Descemet membrane was perforated during manual dissection. Both patients declined PK, preferring to wait for corneal clearance after re-endothelialization for the perforation.

    More Cornea: Using epi-on CXL for treating thin corneas 

    After initial clearance, one eye showed progressive corneal decompensation for which PK has been scheduled. The cornea of the other eye cleared slowly and BSCVA improved during the first postoperative six months. The researchers excluded the two eyes from postoperative evaluation.

    Of the remaining 20 eyes, a mean follow-up of 20 months (range 12-36 months) showed a flattening effect in 18.

    Recent: Performing femtosecond laser-assisted keratoplasty for keratoconus

    On average, maximum keratometry (Kmax) decreased from 77.2 D to 69.2 D a month after the surgery. Anterior SimK decreased from 64.0 before surgery to 58.9 at 1 month after surgery. Posterior mean keratometry decreased from -10.1 to -9.0 D. The changes were statistically significant (p < 0.001).

    After the first postoperative month, Kmax stabilized. SimK and posterior keratometry showed a small regression from 1 to 6 months after surgery (p < 0.028), then also stabilized. In two eyes, the corneal curvature continued steepening for reasons that were not clear.

    More: How the cornea contributes to IOL power calculation

    One eye had low visual potential because of a cataract, and another had preoperative visual acuity measured only with a contact lens.

    BSCVA changes

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