**2.1.2 Risk factors**

The infection was caused by poor and improper contact lens hygiene in each and every case. All lenses involved were hydrogel soft lenses: 1 daily, 4 monthly and 1 yearly disposable. None of the lenses have been applied for extended or continuous wear. Two patients rinsed the lenses in tap water, 4 patients went to swim in them. The half of the patients got the lenses from opticians, the other half from ophthalmologists.
