Piggyback Photochromic Contact Lens for Visual Rehabilitation and Photophobia Management in Traumatic Aniridia

Abstract: We report herein a case of fitting with a photochromic silicone hydrogel contact lens under a rigid gas-permeable lens (piggyback system) for photophobia and low vision correction after traumatic aniridia and aphakia. A 40-year-old woman was referred to our practice for contact lens fitting in her right eye, which was left aphakic after an open globe injury. She also presented traumatic aniridia in the right eye, and her left eye had been previously eviscerated. A successful fitting was obtained with a photochromic silicone hydrogel (senofilcon A) contact lens, with a Dk/t of 121 × 10 −9 , under an aspheric design, +13.00 D rigid gas-permeable lens. The patient displayed visual acuity and contrast sensitivity improvement and reported decreased photophobia.