Among Singaporean adults of Chinese origin aged 40 to 79 years old, 1.1% and 0.5% were reported as being visually impaired and blind in both eyes respectively. The key role of primary care doctors in the management of a patient with impaired vision is to diagnose its likely cause so that the patient can be referred to the appropriate eye care professional (i.e. optometrist or ophthalmologist) for treatment.