title: Special refractive conditions.
mesh_terms: D001036:Aphakia, Postcataract; D001251:Astigmatism; D003261:Contact Lenses; D003263:Contact Lenses, Hydrophilic; D006801:Humans; D006956:Hyperopia; D007640:Keratoconus; D009216:Myopia; D010353:Patient Education as Topic; D011305:Presbyopia; D055656:Prescriptions