[Efficacy of rigid gas permeable contact lens for the correction of mixed astigmatism].
To evaluate the efficacy of rigid gas permeable contact lens (RGPCL) for the correction of mixed astigmatism. Patients with mixed astigmatism by mydriasis refraction were selected as subjects. Routine eye check was performed to exclude contraindication of contact lens. Investigation included visual acuity, keratometry and corneal topography. Average keratometry value was chose as base curve of the first trial lens. Final base curve, diameter, material and edge of lens were prescribed according to the centralized position, movement and fluorescence pattern of trial lens. After over refraction, final refractive power of lens was prescribed. Corrective visual acuity with spectacle and rigid gas permeable contact lens were compared in 24 patients (31 eyes). Corrective visual acuity of patients with RGPCL was much better than those with spectacle. RGPCL is safe and effective to correct mixed astigmatism.