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Mechanic Lens/ Prism Grinding Practice Test: Optical Instruments & Devices
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Mechanic Lens/ Prism Grinding Practice Test: Optical Instruments & Devices
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12 Questions

1. Which instrument used for checking the power of lens?
2. ..........         is an equipment is used to determine the refractive error of the eye.
3. The Theodolite instrument is used for...........
4. A telescope with a larger diameter lens        .
5. ....................is an instrument used to test individual lenses on each eye during an eye examination.
6. Retinoscope is used by        .
7. Which instrument is used for checking the power of lens?
8. The periscope is used for       .
9. In which of the following instruments, the objective has a large focal length and a very large eyepiece?
10. The least distance of vision for normal eye is..........  .
11. The Retinoscope is used by...........
12. Which device is used to measure the refractive index of a substance?

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