Console Basics. Consoles are specialized, prepackaged computers designed, first and foremost, for playing video games on your TV. They tend to be much cheaper than gaming PCs, but they only work with games made for a given system. The PlayStation 4, for example, only supports PlayStation 4 games.
1. CORNEAL DIAMETER- HVID OPTOM FASLU MUHAMMED. 2. ï¨ Technique 1: ï¨ Corneal Topographer :use the biometric ruler within the corneal topography software program to measure your patientâs horizontal visible iris diameter (HVID). ï¨ It may be necessary to measure at a 45 degree oblique angle as the topographer may cut off part of the cornea in the horizontal plane.
The indices of refraction (ni and nr) are given and the angle of incidence can be measured. With three of the four variables known, substitution into Snell's law followed by algebraic manipulation will lead to the answer. Solution to Example A First, use a protractor to measure the angle of incidence.r = index of refraction of the refractive medium. This relationship between the angles of incidence and refraction and the indices of refraction of the two media is known as Snell's Law. Snell's law applies to the refraction of light in any situation, regardless of what the two media are.