What you MUST bring on your First Day: 1  Any two of the acceptable forms of identification listed in the Form I-9 list of acceptable documents. 2  A check to verify that information on the direct deposit form is correct. There is no need to void a check.
Manifest refraction - A manifest refraction is the most traditional way of measuring one's refractive error. As mentioned above, it is usually the part where the patient is shown choices and is involved in the process.
Refraction occurs when a wave passes from one medium to another and is bent; that is, the wave deviates from the straight-line path it would have otherwise followed. For example, light passing through a prism is bent when it enters the prism and again when it leaves the prism. The light is therefore refracted.