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 background in which horizontal and vertical parallel lines make up a perfectly squared surface. In the centre is a white spot that serves as the fixation point. This test is useful for those patients that complain of central field loss and/or distorted central vision.
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...
The technique allows stereoscopic, wide-angled, high-resolution views of the fundus and overlying vitreous. Its optical principles and illumination options allow for visualisation of the fundus regardless of high ametropia, hazy ocular media, or central media opacities.
Negative powered auxiliary lenses in conjunction the slit-lamp biomicroscope can be used to view the vitreous and retina and in particular the optic disc and the macula. For clinicians with some level of binocularity a binocular direct image is viewed. The use of the slit-lamp biomicroscope allow...
