Eyeglass Prescription ChallengeOnline version Test your knowledge on transposing eyeglass prescriptions with this fun quiz! by Janine Lewis 1 What does 'transposing' an eyeglass prescription involve? a Changing the format of the prescription. b Changing the frame size. c Adjusting the lens thickness. d Altering the lens color. 2 What is the first step in transposing a prescription? a Determine the lens material. b Select the frame style. c Identify the sphere and cylinder values. d Measure the pupillary distance. 3 What type of prescription is the following? OS -3.00 +1.00 x 090° a An astigmatic Left eye prescription for Hyperopia b A spherical prescription for the Left eye c A presbyopic prescription for the Left eye d An astigmatic Left eye prescription for Myoptia. 4 What type of prescription is the following? OD -7.50 sph a An astigmatic right eye prescription. b A Sphere only power prescription for the Right eye c A Sphere only power prescription for the Left eye d A Farsighted prescription for the Right eye 5 When transposing, what happens to the cylinder value? a It changes sign. b It is doubled. c It remains the same. d It is halved. 6 What is the purpose of transposing a prescription? a To change the lens material being used b To convert the prescription from one cylinder style to another c To adjust the pupillary distance d To increase lens thickness. 7 What does a negative sphere value indicate? a Astigmatism. b Myopia (nearsightedness). c Hyperopia (farsightedness). d Presbyopia. 8 What is the result of transposing a prescription from plus to minus cylinder? a The sphere value increases. b The prescription becomes invalid c The cylinder value becomes negative. d The axis value changes 180°. 9 Which value must be preserved during transposition? a The pupillary distance. b The lens coating. c The axis value d The total power of the lens. 10 What is the axis value in a prescription? a The orientation of astigmatism correction. b The distance between pupils. c The type of frame being used. d The thickness of the lens. 11 Use the following prescription: +3.00 -2.00 x 135. What is the power at 045°? a +1.00 x 045° b -2.00 x 045° c +3.00 x 045° d +1.00 x 135° 12 Which are the lensometer Sphere Mires a The three thick green lines b The black circles in the lensometer c The three thin green lines d The power drum 13 Which are the lensometer Cylinder Mires a The three thick green lines b The black circles in the lensometer c The three thin green lines d The power drum 14 Use the following prescription -8.00 +4.00 x 180°. What is the power at 180° a -8.00 x 090° b -4.00 x 180° c -8.00 x 180° d +4.00 x 090° 15 Which are the lensometer Prism Mires? a The three thick green lines b The black circles in the lensometer c The three thin green lines d The power drum
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