The use of a gas permeable hard lens for extended wear.
D000368:Aged; D003261:Contact Lenses; D004172:Diplopia / Q000628:therapy*; D005260:Female; D006801:Humans; D008268:Macular Degeneration / Q000628:therapy*; D012030:Refractive Errors / Q000628:therapy*; D013997:Time Factors