This test consists of a series of plates designed to provide a quick and accurate assessment of colour vision deficiency of congenital origin. Most cases are characterised by a red or green deficiency.
The test comprises selected paper colour samples. On each page, four colour samples surround a central spot and the subject must choose the one that most closely resembles the colour of the central spot. Each page provides possible protan, deutan or tritan confusions that may be mixed with a norm...
The Amsler grid is a test chart used to determine quality of central vision and allows the analysis of disturbances of visual function, which accompany the beginning and evolution of maculopathies. The standard chart to be used in this practical consists of a square with white lines on a black ba...
Children may become frightened as the clinician approaches closely, during direct ophthalmoscopy and co-operation could be lost. Also, children often look at the ophthalmoscope light and track it as the clinician moves, allowing examination of the macula but not the optic disc. Furthermore, the f...
