1. Bifocals help by providing fixed amount of extra power, while trifocals provide two, usually in steps of one diopter or more. True

(2) False None of the above Can't say

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2. With a progressive lens the eye can find some region of the progression zone where the power is correct for the viewing distance. True False None of the above Can't say

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3. When there is a need of separate corrections for distance, intermediate and near vision, prescription can be given in one pair of spectacles as trifocal lenses. True False None of the above Can't say

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4. In dispensing a pair of progressive power of lenses, it is imperative to ensure that each lens is correctly positioned with respect to the pupil. True False None of the above Can't say

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5. The surface astigmatism inherent in progressive lenses produces a significant amount of cylinder power, which the wearer perceives as blur. True False None of the above Can't say

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6. Soft design concentrates the intense aberrations into small regions adjacent to the progressive corridor near add area. True False None of the above Can't say

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7. Variable power lenses rely on some mechanical means of adjusting the power, operated by the wearer. True False None of the above Can't say

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8. Advantage of wider field of clear vision produces higher amounts of unwanted astigmatism. True False None of the above Can't say

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9. A single vision reading lens consists of a single sphere,of appropriate radius providing correction for near vision only.

(1) True False None of the above Can't say

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10. Which of the following is the process of modelling the theoretical optical performance of the lens as perceived by the wearer with the lens? Ray tracking Ray tracing Both and None of the above

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11. There is no image Shift in PALs Jump in PALs Both and None of the above

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12. To ensure which of the following types of fusion, the retinal images formed in each eye must be similar in all directions of gaze? Sensorial Motor Both and None of the above

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13. The eyes naturally Diverge while gazing for near Converge while gazing for near Both and None of the above

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14. Shorter corridors produce more of which of the following power changes and higher levels of astigmatism? Rapid Slow Moderate None of the above

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15. Which of the following lenses claims to provide natural vision like a young individual Progressive lenses Bifocal lenses Single vision lenses Trifocal lenses

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16. A single vision reading lens consists of a of appropriate radius providing . correction for near vision only. Single sphere Double sphere Triple sphere None of the above

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17. The "Twin Rx Technology" is/are Wavefront Management System Point by Point Twinning Both and None of the above

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18. Pupillometer is used for Pantoscopic tilt measurement Facial wrap IPD measurement None of the above

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19. Physical measurements of a new progressive addition lens are supplied in the form of

(1) The Grid and Contour Plot

(2) The Eye-Path Profile of Progression

(3) Three-Dimensional Topographical Plot

(4) All of the above

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20. Early progressive lenses were Asymmetrical in design Symmetrical in design Both and None of the above

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21. Soft design has a long progressive Corridor Cord Rod None of the above

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22. Early designs of progressive power lenses are The Owen Aves lens The Gowlland lens Both and None of the above

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23. Types of variable power lenses are Double lens systems Deformable lenses Both and None of the above

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24. vision includes simultaneous perception, fusion of the images and the stereoscopic sense. Binocular Single Both and None of the above

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25. Advantages of progressive lenses are No visible segments or lines of demarcation Clear vision at all distances No unwanted differential image displacement or jump All of the above

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26. Unwanted Astigmatism is influenced by . Add power Length of progressive corridor Width of distance and near zones All of the above

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27. The principal parameters of a progressive addition lens are interrelated and include The size of the distance and near areas The types and intensity of the aberrations The depth and usable width of the progressive corridor All of the above

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28. The limitation of the hard design is Low aberration High aberration Clear vision None of the above

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29. Which of the following is the inclination of the bottom of the lens towards the face from a vertical plane? Pantoscopic tilt Splay angle Frontal angle Back angle

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30. In progressive addition lenses, increase in power is caused by an increase in Curvature in the progressive zone Radius in the progressive zone Diameter in the progressive zone None of the above

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