Complications associated with hard contact lenses.
D003261:Contact Lenses / Q000009:adverse effects*; D003316:Corneal Diseases / Q000209:etiology; D005128:Eye Diseases / Q000209:etiology*; D006801:Humans; D011625:Pterygium / Q000209:etiology; D012030:Refractive Errors / Q000209:etiology; D014985:Xerophthalmia / Q000209:etiology