COT Exam Questions and Answers 2024 100% Pass

COT Exam Questions and Answers 2024 Due to refraction a prism bends light rays toward the ___________of the prism? - Answer-Base What is P=C/D ? -Answer-P = Prism C = the displacement of the object in cm D = the distance between the prism and the virtual image in meters This formula explains the relationship between the power of prism and the ability to bend light. Two Prisims base-to-base form what type of lens? -Answer-Plus or Convex Convex lenses do what to light rays? -Answer-Converge them Two prisms placed apex-to-apex for what kind of lens? -Answer-Minus or Concave What is Prentice's Rule? -Answer-A rule to calculate induced prism in glasses whose optical centers have been decentered. Induced prism=lens power (in D) X Optical center displacment (in cm) Cinically, Infinity is determined to be at what distance? -Answer-20 feet (6 meters) Explain Amplitude of Accommodation -Answer-its the Lens's change (in diopters) from a state of no accommodation to maximum accommodation What does Prince's Rule measure? -Answer-near point of accommodation, and bifocal and trifocal add power what is the focal length (in meters) of a 3 diopter lens? -Answer-P=1/f 3=1/f 3f=1 f=1/3 or 33 cm Snell's Law determines what -Answer-whether the refacted ray will bent toward the normal or away from it Index of Refraction (IR) compares what? -Answer-Speed of light in a vacuum to the speed of light in a given substance What is the IR of Water? What is the IR of Crown Glass? -Answer-Water is 1.33 Crown Glass in 1.517 What is axial length? -Answer-The length of the eye from the front surface of the central cornea to the macula With the rule astigmatism is at what axis? -Answer-90 Against the Rule astigmatism is at what axis? -Answer-180 Hirschberg Test -Answer-uses corneal light reflexes to determine anestimation of misalignment Krimsky Test -Answer-uses prisms to equalize position of corneal light reflexes