Parts one and two of this series discussed nutritional and botanical treatments for cataracts, glaucoma, and retinal diseases (macular degeneration, diabetic retinopathy, retinopathy of the newborn, and retinitis pigmentosa). This review discusses nutritional treatments for asthenopia, blepharitis, chalazion, conjunctivitis (including giant papillary conjunctivitis), gyrate atrophy of the choroid and retina, keratoconus, myopia, sicca syndrome (dry eyes), and uveitis. The evidence presented in this three-part series indicates natural medicine has an important role to play in the practice of ophthalmology.