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Jennifer S Harthan,1 Ellen Shorter2 1Illinois College of Optometry, Chicago, IL, USA; 2University of Illinois at Chicago, Chicago, IL, USA Abstract: Scleral lenses are being prescribed for the management of corneal irregularity, uncomplicated refractive error, and ocular surface disease. There are many potential therapeutic uses of scleral lenses in addition to providing similar benefits as corneal gas permeable lenses. Scleral contact lenses are a valuable therapeutic tool for patients with ocular surface disease as these lenses protect the ocular surface, provide continuous corneal hydration while providing optimal visual correction, and are often used in conjunction with other therapies. Keywords: scleral lenses, ocular surface disease, contact lenses

Stephanie R Fromstein, Jennifer S Harthan, Jaymeni Patel, Dominick L Opitz Department of Clinical Education, Illinois College of Optometry, Chicago, IL, USA Abstract: Demodex folliculorum and Demodex brevis are two mites which infest the human eye and which may, in excess, lead to a wide range of anterior segment findings. Demodex mites have been implicated in anterior and posterior blepharitis, blepharoconjunctivitis, blepharokeratitis, and beyond. Due to significant overlap with other anterior segment conditions, Demodex infestation remains underdiagnosed and undertreated. Definitive diagnosis can be made with lash sampling, and the most common mode of treatment is with tea tree oil in varying concentrations. This article summarizes elements of pathogenesis, diagnosis, and management critical to clinical care of this common condition. Keywords: Demodex folliculorum, Demodex brevis, blepharitis, blepharoconjunctivitis, meibomian gland dysfunction, ocular rosaceaA Letter to the Editor has been received and published for this article.