Frames and Materials Quiz

Transcription

1 Frames and Materials Quiz 1. A set number is determined by taking the standard pattern size and (adding/subtracting) the actual pattern size. 2. A lens is to be edged for a frame with A 53 mm. The pattern is labeled set -15. What is the proper edger setting? What will the A of the pattern be? 3. A frame pattern measures A 46.5 mm. A lens is to be edged for a frame with A 50 mm. Where should the edger be set? 4. The part of a frame which connects the frame front to the temple but is not yet the hinge is called the. 5. A frame front is made up of the and. 6. The longest part of the temple is called the. 7. A frame made of mixed materials whose temples are plastic, top eyewires are plastic, bottom eyewires are metal, and which has nosepads would be classified as (metal/plastic). 8. Keeping a lens in a plastic frame requires a mounting. 9. A nylon cord mounting is also called mounting. 10. A rimless mounting could also be called by what two other names? 11. A bridge on a plastic frame designed to rest entirely on the molded nosepads without touching the top of the wearer s nose is called a bridge. 12. What type of bridge is standard on a plastic frame and may be added for comfort to a metal frame? 13. A endpiece has no hinge; instead the eyewire and temple shaft are connected by one curved wire. 14. Most plastic frames have style temples that bend around the curve of the wearer s ear. 15. style temples do not curve. They are (more/less) suitable for the active wearer. 16. A plastic frame whose temple curls most of the way around the ear has temples. A metal frame that behaves similarly has temples. 17. Today the nickname zylonite refers to what kind of material?

2 18. A customer has narrowed their frame choices to one of zylonite, one of Monel, and one of carbon fiber. She wishes to tighten the temple bend. Which frame is now out of the running? 19. (Cellulose acetate/optyl) has plastic memory and will return to its original shape when heated. 20. Polycarbonate is sometimes used for frames. 21. A customer with nickel allergies should avoid (stainless steel/monel/titanium) frames. 22. T/F: Most plastic frames are hypoallergenic. 23. T/F: Certified 100% titanium frames may be a titanium alloy. 24. T/F: Certified 100% titanium frames may include some nickel content. 25. The (boxing/datum) system of frame measurement replaced the (boxing/datum) system in The distance between the top and bottom of the box is called the measurement; the distance between the right and left sides of the box is the measurement. 27. What does the ED measurement stand for? What does it help determine? 28. A frame with a large frame difference is (squarer/more rectangular). 29. The of the lens is the point at which two lines drawn from the corners of the box meet. 30. Temple length is measured from the (butt/screw) to the end of the temple tip along the center of the temple. 31. A frame marked 50/16/140 is stating which measurements? 32. T/F: The horizontal measurement along a lens midline is always the same as the A measurement. 33. When the customer is selecting a frame, do not be overly insistent about but do be insistent about. 34. Name at least three concerns an optician should carefully explain to a patient who wishes to re-use old frames. 35. In general, convential wisdom states frame shapes should (contrast/echo) face shapes. 36. Higher temple attachment to the eyewires can make a wearer s face seem (longer/shorter). 37. A lower bridge can make a wearer s nose seem (shorter and wider/longer and narrower). 38. Would a progressive wearer be better served by a Wayfarer or Aviator style frame?

3 39. Frames for a progressive wearer should have (little/ample) vertex distance. 40. The measurement needs to be large enough for the progressive wearer. 41. Frames for children should primarily consider. 42. (Positive/Negative) face form means the temples are (closer to/further from) the face than the bridge and should be avoided. 43. How is a lens minimum blank size for manufacture calculated? 44. What would the minimum blank size be for a frame A 52 mm, DBL 18 mm, ED 57 mm, with a wearer PD of 62 mm? 45. Frames made of material will react to alcohol. 46. When bringing a frame into standard alignment, start with the and work toward the. 47. The ideal temples should make a degree angle with the frame front. 48. Increasing the pantoscopic angle (increases/decreases) the spherical equivalent of the lens. 49. The ideal pantoscopic tilt for a progressive wearer without an extremely high prescription is degrees. 50. Bowing a frame s temples (creates/relieves) pressure on the wearer. 51. A hard nosepad with less friction is likely made of, while a softer nosepad with more friction is likely made of. 52. To lower the frame front, (spread/narrow) the nosepads. 53. When the right side of a frame sits too low on a wearer s face, angle the right temple (up/down) or the left temple (up/down). 54. A lens will not cut out error usually means a patient s PD is too (small/large) for the frame, so that the lab does not have a (large/small) enough lens blank to manufacture the lens. 55. The terms OC and MRP are synonymous unless a lens has, in which case the pupil is located at the (OC/MRP). 56. Titanium forms the basis of frames, which return to their original shape after being bent. 57. To move the frame farther from the face, (decrease/increase) the distance between the nose pads and the frame front.

4 58. The left lens of a patient s frame is pulled farther in to their face than the right lens. To fix this, adjust the (left/right) endpiece in or the (left/right) endpiece out. 59. High (plus/minus) wearers should choose frames with flat frame fronts. 60. (Pantoscopic/Retroscopic) tilt means the bottom eyewires are (closer to/further from) the face than the top eyewires and should be avoided. 61. The relative refractive index of what substance is 1? 62. T/F: Poly is thinner than glass or plastic. 63. A lens will always have some unwanted peripheral cylinder. 64. The material most like glass in terms of refractive index and Abbe value is ; however, it needs to make it more resilient, it is not impact-resistant, and its thickness is not suitable for high prescriptions. 65. A highly impact resistant material is ; it is (thicker/thinner) than plastic and has a (higher/lower) Abbe value. It works best with and coatings. 66. High-index plastic has an index of refraction from to. 67. Scratch-resistant and anti-reflective coatings (increase/decrease) the impact resistance of a material. 68. Trivex has (more/less) chromatic aberration than plastic. 69. The most common type of plastic for use in lenses is called ; it was developed by, who also developed Trivex. 70. What is the standard pattern size for a patterned edger in millimeters? 71. To find a patterned lens edger setting, add the and.

5 Frames and Materials Answers 1. subtracting mm, 40 mm mm 4. endpiece 5. eyewires, bridge 6. temple shaft 7. metal 8. bevel-bezel 9. semi-rimless 10. three-piece, drill mount 11. keyhole 12. saddle 13. continuous 14. skull 15. Library, less 16. riding bow, comfort cable 17. cellulose acetate 18. carbon fiber 19. Optyl 20. safety and sports 21.Monel 22. T 23. T 24. F 25. boxing, datum 26. A, B 27. effective diameter ; determines the smallest possible lens blank needed to manufacture the lens 28. more rectangular 29. geometric center 30. screw 31. A, DBL, and temple length 32. F 33. style; safety and optics 34. risk of stress and breakage; eliminating an emergency backup pair; risk of parts being unavailable for repair; lab needing to have the frame onsite to shape the lens; style concerns 35. contrast 36. longer 37. shorter and wider 38. Wayfarer 39. little 40. vertical depth or A 41. safety 42. Negative, further from 43. frame ED + total decentration + 2 mm

6 mm 45. rubber 46. bridge, temples increases creates 51. acetate, silicon 52. spread 53. down, up 54. small, large 55. prism, MRP 56. flex metal 57. increase 58. left, right 59. plus 60. Retroscopic, farther from 61. air 62. T 63. progressive 64. CR-39, SRC 65. polycarbonate, thinner, lower, SRC, A/R , decrease 68. more 69. CR-39 resin, PPG Industries mm 71. eye size, set number