Visual function after penetrating keratoplasty for keratoconus: a prospective longitudinal evaluation

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Abstract
AIMS To evaluate visual function and vision specific health status in patients undergoing penetrating keratoplasty for keratoconus. METHODS A prospective longitudinal study measuring logMAR visual acuity, contrast sensitivity, disability glare, binocular visual field, stereoacuity, and subjective visual function (VF-14) was conducted on 18 patients with keratoconus undergoing penetrating keratoplasty (PK), including six patients who had already had PK in the fellow eye. Data were collected preoperatively and at 3, 9, and 18 months after surgery. RESULTS Within 3 months of surgery there was significant improvement in aided visual acuity, contrast sensitivity, and stereoacuity (pCONCLUSIONS There is substantial and rapid improvement in visual function and vision specific health status in keratoconic patients as a result of uncomplicated penetrating keratoplasty.