Extra Explaining Questions - OPTICAL INSTRUMENTS

OPTICAL INSTRUMENTS

1. a) Technician reported observation for two patients with defects of an eye as one with shortsightedness and other with long-sightedness. What do you understand by the defects of the eye mentioned by the technician above?
   
   b)  Suppose you are the optometrist; what advice can you offer the patients observed by the technician above so as to correct their defects?


2. A form four student observed that his grandfather positions a book far from his eyes when reading it. Explain the type of lenses that the student should advice his grandfather to wear.


3. Two students complain that they cannot see objects that are closer than 1 m from their eyes.
   1. What problems do they have? Describe it using a neat diagram.
   2. How can their problems be solved?


4. With the aid of diagram, describe how the eye of a person suffering from short-sighted cannot see a distant object clearly.


5. When a slide projector is used the slide must be put upside down and the image is magnified laterally as well as vertically.” Explain this statement.