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.
One ray (called the extraordinary ray) is bent, or refracted, at an angle as it travels through the medium; the other ray (called the ordinary ray) passes through the medium unchanged. 1  Double refraction can be observed by comparing two materials, glass and calcite.