<prompt> Amslers grid is used to evaluateCentral 10 degress of visionCentral 20 degrees of visionPeripheral visionLens opacity  <response>: The Amsler grid is a tool that eye doctors use to detect vision problems resulting from damage to the macula the central pa of the retina or the optic nerve. The damage may be caused by macular degeneration or other eye diseases, so the Amsler grid is useful in detecting these problems. Reference: AK khurana 7th edition 