Case Report: Modified Piggyback System to Treat Peripheral Iridotomies and Degenerative Myopia

This report details how a case with degenerative myopia and symptoms secondary to laser peripheral iridotomies is managed with a modified piggyback contact lens system. The benefits of using a system with tinted and gas-permeable (GP) lenses are discussed.

This study aimed to report the positive outcome of a modified piggyback system in the treatment of degenerative myopia and iris abnormalities.

A patient with degenerative myopia presented with visual disturbances secondary to laser peripheral iridotomies in both eyes. A modified piggyback system was trialed using a corneal GP lens overlaying a tinted soft contact lens to provide optimal vision and visual comfort in both eyes. After optimizing the fit, there was a reduction in glare and improved vision.

Hard contact lenses often provide superior optics and vision compared with soft lenses, especially to patients with high refractive errors. Patients who require hard lenses and also have visual disturbances secondary to iris abnormalities could be managed with a modified piggyback contact lens systems using a corneal GP lens and tinted soft lens.