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Abo review test 2
| Question | Answer |
|---|---|
| What are the causes of one lens being higher than the other | 8 bent ear piece, a bend in the temple staff, a skewed Bridge, one ear higher than the other. |
| If the wear complains of the bifocal line being somewhat in his way when driving, the problem Maybe alleviated decreasing the distance between pads. True or false | Fales |
| The fitting triangle is | A triangle representing the main supporting points of a pair of glasses |
| If the eyelashes rub the lenses, the fitter should | Increase the vertex distance |
| If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is that | Pressure is being applied by the temple staff anterior to the ear |
| When viewing the wearer from the front, it is discovered that the frame sits too far to the left the wearers right, on the wearers face. This could be caused by | Both pads shifted to the wearer's left, the wearer's nose being crooked |
| If both nose pads press the nose or indent too much, what is probably not a possible cause | Temple spread is not even |
| To eliminate a gap between the lenses and a metal wire, the best alternative is to | Place a strip of lenses liner at a point exactly opposite of the gap |
| Which factor is not essential in dispensing the progressive add lenses | A good pantoscopic angle, short vertex distance, large B dimension, good monocular lenses centration |
| That ______ follows the bridge of the nose smoothly, spreading the weight of the frame and utilizing nose pads attached to the back of the bridge | Modified saddle Bridge |
| what is the geometrical Center distance of a frame mark 52/17 | 69 |
| The larger the frame distance ______the lens shape | The narrower the shape |
| If a frame dimensions are A=50 ED=55 with a frame distance of 8 what is B | 42mm |
| A-frame is March 52/18. The lens shape is round. What is the effective diameter of the lens | 52mm |
| What errors are of no consequence in verifying correctness of lenses and frames | Air space between lenses and frames comma ships in the lens Edge between bevel and lens surface, distortion or unevenness of lenses between Edge bevel and lens surface |
| Which is the most favorable alternative to a 50/20 frame measuring bifocal height when that particular size is not available | 48/20 |
| The present spectacles of a patient have a segment height of 14 mm. The safe line is 4 mm below the lower eyelid margin. On the new frame the distance from the lowest part of the inside lower I wire to the lower eyelid margin is 17 mm. What is the new bif | 13 mm |
| When the worst PD is less then the frame PD | Positive face form is required |
| A-frame is marked 4818 but actually measures 47/18. The actual measured bifocal height is found to be 14.5 mm. If lenses only are ordered or the same frame what bifocal height would you specify on the order form | 14.5 mm |
| The new bifocal where must | Dropped the eyes to read a book |
| When the frame front is tested or four point touch, but only touches on to Temple sides, the frame______. | Has face form |
| What errors will not be detected by a four-point touch | Skewing |
| It is unnecessary to use heat in adjusting a zyl frame when | Changing the pantoscopic angle |
| If you didn't adjust the eyepiece on the lensometer and the Power Drum reads Plus .25 when the target lines are cleared and focus what do you expect the true readings for this pair of glasses to be OD -1.75 OS +1.75 | -1.50, +2.00 |
| If the pad arms are bent up and the pads realigned this adjustment will | Drop the front |
| What is the final step in fitting a frame to a patient | Adjusting the temples |
| If the frame is crooked with the right side higher than the left, which is not a possible cause | The pantoscopic tilt of the right side needs to be increased |
| A customer's RX is -10.00 and his vertex distance is 12 mm. This customer wants to wear the glasses closer. What do you expect the new RX to be | Not enough information |
| The main reason for the use of lenticular lenses for high Powers would be | They are lighter in weight |
| A patient comes back to the optician complaining of pain behind the years a possible causes are | Temple tension too great, uneven pressure, Temple and pieces angled into much |
| What type of frame may be heated until it bends under its own weight | Optyl |
| The steps for finishing a lens in correct order are | Calculation, spotting, centration, blocking, edging |
| Why is it necessary to take the B measurement | Vertical decentration |
| Given the RX OD + 13.00 sphere, OS balance, add 2.75 diopters what balanced lens would provide the best appearance | +13.00 sphere, add 2.75 |
| Would a pair of spectacles is tilted so that the bottom of the lenses are closer to the face than the top it is | Pantoscopic tilt |
| For every two degrees pantoscopic tilt the optical center should be | Lowered 1 millimeter |
| Outward inclination of the bottom of the frame is called | RetrosCopic tilt |
| It is generally accepted procedure to fit the top of the trifocal segment to the | Bottom edge of the people |
| Usually reading is considered to be ___ mm below | 8 mm |
| Trifocals are generally prescribed when the patient is | In advance presbyope |
| A bifocal lens we're having difficulty accommodating could most often be helped by add a _____ to his prescription | Plus power |
| What occupationscould be best suited with double segment lenses | Electrician |
| The standard distance between the segments in a double segment multifocal in most cases is | 13 to 14 millimeters |
| What is essential to place a prescription order | Lens prescription comma frame name size and color, customers fitting dimensions. |
| Excessive base up prism | Makes people feel like they are walking down hill |
| Polycarbonate lenses block ultraviolet radiation true or false | True |
| Photochromic lenses will be darkest on what kind of day | Cold and bright |
| What kind of lens material is generally thought to provide the best impact-resistant for children's eyewear | Polycarbonate |
| A number 3 tint absorbs | 80% of the light entering the lens |
| A lens is AR COATED to | Increase transmission, reduce reflection, increase vision. |
| A customer complains that his old glasses have better visual Acuity than new glasses save RX. What should the optician do? | Check the base curve |
| What should the addition do when a customer comes in and complains of severe eye pain | Refer the customer to the doctor |
| If a patient complains of too much pantoscopic tilt. What should you do | Angle the Temple's upward from the end piece |
| A patient with a high prescription should wear a small frame to minimize | Decentration, thickness, weight |
| What shape frame should be worn by high minus patients | Rounded corners |
| Active people should wear what type of Temple Style | Comfort cable or riding bow |
| People that have their glasses on and off should wear ______ type temples | Library |
| Within the first few minutes of contact with a new patient you must | Generate in the customer confidence in your ability |
| What can you expect Medicare to cover | Corrective lenses following cataract surgery |
| When the optician advises the customer as to the breakage of lenses and the risk of injury, it is described in terms of | Impact resistance |
| The principal Consumer Protection Agency of the federal government is the | Food and Drug Administration |
| Prism tolerance in the vertical Meridian is | 1/3 prism diopter |
| As a general rule patient tolerance for prism and balance in the horizontal Meridian is | 2/3 prism diopter |
| The cylinder axis tolerance for a .25 diopter cylinder is | 7 degrees |
| The cylinder axis tolerance for a .75 diopter cylinder is | 5 degrees |
| The cylinder axis tolerance for a one diopter cylinder is | 3 degrees |
| The cylinder axis tolerance for a to die after cylinder lens is | 2 degrees |
| The tolerance for lens thickness with specified for special prescription purposes is | Plus or minus .3 millimeters |
| The segment location tolerance in the vertical segment height Meridian in a mounted pair of eyeglasses is | Pairs should match within 1.0 mm of specification |
| RX OD + 2.00 + 2.00 x 90 OS + 3.00 + 3.00 x 180 the tolerance of the cylinder axis of the right lens is | 2 degrees |
| Lens calipers are used to measure lenses for | Lens thickness |
| Line axis Pliers are used for the purpose of | Straightening lens axis and zyl frames |
| The prism measurement indicator found in a vertometer or lensometer is called them | Reticle |
| The instrument that can help you determine a heat Tempered Glass lens is | Polariscope |
| The Power Drum of a lensometer reads + 2.25 for the spear and -1.00 for the cylinder and the axis is 45 what is the cylinder of this lens | -3.25 x 45 |
| Glass lenses for standard use must withstand | A 5/8 steel ball drop from a height of 50 feet |
| The instrument to check the vertex distance is a | Distometer |
| A presbyopic golfer wants glasses for golf only period what would you recommend | Round 22 decentered low |
| For a high minus RX, which of the following will improve the appearance of the glasses High index plastic,steep base curve, A frame with a small ED,less decentration | High index plastic, A frame with a small ED, Less decentration |
| Rx -12.00 RVD IS 11MM FVD IS 16 MM. What RX would you order | - 12.50 |
| Rx OD -4.50 4BD OS -5.00 2BO What is the usual way of ordering the lenses | OD -4.50 2 BD 1BO OS -5.00 2BU 1BO |
| Which of the following is recommended for children's Bridge | Keyhole |
| A frame fits perfectly on your patient. The temples, bridge, and pads are fine, but the frame sits high. You should select a frame with a bridge that is | Wider |
| Which lens design would you recommend for a high plus RX | Aspheric |
| RX OD + 10.00 - 1.00 x 80 OS balance. What is the best lens for the left eye | + 9.50 |
| OU + 11.00 - 1.00 x 90 add 3.00. This is aphakic patient. He wants a separate sunglasses for golf what would you recommend | Just a SV and tell him to slide the glasses down the nose to see near |
| Standard trifocals have an intermediate that is | 50% of the near add |
| RX oh you -2.75 + 1.00 x 180 add 2.00 PPD 64/60. Patient needs single Vision near glasses what would you order | + 1.25 + 1.00 x 180 PPD 60 |
| How long should a prescription of a patient be kept | 3 years |
| The pantoscopic tilt can be increased up to | 18 degrees |
| If the RX is ordered as a + 3.50 - 1.00 x 90 and received + 3.00 - 1.00 x 90 what would that optician do | Send it back to the lab |
| The focal length of a 2.00 diopter lens is 20 inches. What happens to the focal length if the power doubles | it cuts in half |
| Which of the following frame design would you recommend to a patient with a flat and low bridge | Adjustable pads |
| Magnesium fluoride is a chemical used for | Reducing the reflection |
| A patient with an RX of plus 10.00 RVD of 16mm chooses a frame with fbd of 11mm what would the RX be | + 10.50 |
| In what Meridian the Slims has the minimum power? Plano - 3.00 x 45 | 45 |
| The limbus is surrounded by | Cornea |
| A meniscus lens is a | Concave convex lens |
| What part of the eye is responsible for 80% of light refraction | Cornea |
| The power of a bifocal add is the difference between | The front vertex measurement of distance and near |
| The best impact-resistant -10.00 diopter lens is a | Polycarbonate lens |
| In boxing system of length measurement, the B represents | Lens depth |
| A plus lens moved downward from the primary position results in | Base down prism effect |
| Tempering tempering a lens by heat results in a lens being | More resistant to impact |
| A polariscope is used to check inserted lenses for | Strain |
| And uncoated glass Lens tinted gray number 3 with an RX of -5.00 diopter will be | Darkest around the edges |
| A lens which reads + 3.00 - 2.00 X 90 is decentered 6 mm too much. How much Prismatic effect will the wear experience | 0.6 Prismatic imbalance |
| A scotoma is | An area of retinal vision loss |
| In normal binocular vision, accommodation is always associated with | Convergence |
| Besides accommodation, the crystalline lens | Filters ultra-violet radiation |
| Images formed on the retina are transmitted to the brain by | Optic nerve |
| An average human eye is _______long | One and one eighth inches |
| The ability to maintain single binocular vision in both eyes is called | Fusion |
| If the RX is + 2.00 - 4.00 x 135, it would be necessary to do Center the lens ______to create 1.00^BI prism | Not possible |
| When aphakic lens is tilted too much pantoscopically, what can be expected to occur | An error of refractive power is induced |
| To widen the distance between the pads of the frame or mounting, Bend arm pads | Outward |
| RX OU - 2.25 - 1.50 x 45 A=44, DBL=24, PPD=62. The lab technician for guests 2D Center the lenses. How much prism is induced in each eye | 0.9^BI |
| A person, wearing bifocal lenses, having difficulty accommodating could most often helped by adding____ to the RX | Plus power |
| When the right Temple is angled down this adjustment will | Raise the right side of the front |
| If the right Temple is angled out this adjustment will | Bring the right side of the front toward the eye |
Created by:
Tuxgirl