20 years and 20,000 contact lens patients.
D000293:Adolescent; D000328:Adult; D003261:Contact Lenses / Q000009:adverse effects / Q000592:standards*; D003263:Contact Lenses, Hydrophilic / Q000009:adverse effects / Q000592:standards*; D003276:Contraceptives, Oral; D004203:Disinfection / Q000379:methods; D005260:Female; D006801:Humans; D009216:Myopia / Q000517:prevention & control; D013997:Time Factors
D003276:Contraceptives, Oral