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The re-evaluation will consist of a repeat attempt to measure visual acuity.
To this end luminaries should have full horizontal cut off using a white light source to improve visual acuity.
Glare from direct, reflected, or scattered sunlight causes discomfort and reduces visual acuity.
The principal cause of visual impairment was identified for eyes with presenting visual acuity 6/18.
Surgery led to an increase in against the rule astigmatism, which was the major cause of uncorrected visual acuity less than 6/18.