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  • Title: Phototherapeutic keratectomy for Schnyder's crystalline corneal dystrophy.
    Author: Paparo LG, Rapuano CJ, Raber IM, Grewal S, Cohen EJ, Laibson PR.
    Journal: Cornea; 2000 May; 19(3):343-7. PubMed ID: 10832696.
    Abstract:
    PURPOSE: To describe the treatment of Schnyder's crystalline dystrophy (SCD) with excimer laser phototherapeutic keratectomy (PTK). METHODS: Chart review of three patients (four eyes) with SCD treated with PTK between March 1992 and December 1998. Pre- and posttreatment visual acuity, subjective glare, photophobia, manifest refraction, ultrasound pachymetry, hyperopic shift, and biomicroscopic findings were studied. Brightness acuity testing (BAT) was evaluated in two eyes. RESULTS: Four eyes were treated during the study period. The average best corrected visual acuity (BCVA) improved from 20/175 to 20/40 under bright conditions. All patients reported subjective improvement in glare and photophobia. No visually significant recurrence was observed during the follow-up period which ranged from seven months to three years. The mean spherical equivalent refractive shift was +3.28 diopter (D). One patient developed irregular astigmatism from an eccentric ablation. No vision threatening complications were observed. CONCLUSION: PTK can be effective at improving visual symptoms in patients with SCD. It can be a useful therapeutic alternative to lamellar or penetrating keratoplasty in these patients.
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