Auto-Kerato refractometer (TOPCON, Version RM 800 and KR 800, Japan)

This advanced device (TOPCON, version RM 800 and KR 800, Japan) incorporates two soft wares that measure not only refractive state of the eyes but also the corneal curvature, thus facilitating the quick diagnosis of short sightedness, long sightedness, astigmatism, presbyopia and keratoconus. When infra-red light falls on the retina, reflected rays of light is captured by inbuilt camera and the internal computer will calculate the values are the basic principle of this instrument. The greatest advantage of the machine is its simplicity of recording the data that can be computed for the research purpose.