4a. A person has a defect of vision and is corrected by LASIK operation. After operation his power of eye-lens is increased to correct his vision. What type of defect of vision the person has? What is corrected distance of vision where he can see an object clearly?
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- Which of the following is true about the eye condition known as hyperopia? Select one: а. It means the eye can focus at short distance, but not long distance, and is corrected with eye glasses that have diverging lenses O b. It means the eye can focus at short distance, but not long distance, and is corrected with eye glasses that have converging lenses It means the eye can focus at long distance, but not short С. distance, and is corrected with eye glasses that have converging lenses d. It means the eye can focus at long distance, but not short distance, and is corrected with eye glasses that have diverging lenses CheckA. A man with myopia has a far point of 20cm. What power contact lens will correct his vision? B. Repeat the same problem for glasses held 1.5cm from his eyes.Problem 102. My wife Margie has lost most of her accommodation. She has a nearpoint of 130 cm and would like to read as close as 40 cm from her eyes. A) What power reading glasses should Margie use? Assume the lenses in the glasses are 2 cm from the eye. B) What is Margie's farpoint while wearing reading glasses?
- The power in Diptera of the spectacle lens that will enable a near-sighted person to see distant objects clearly is -2D. What is the maximum distance the person can see without wearing the contact lens?Create a ray diagram for eyeglasses that contain a diverging lens. Assume you are looking at a 2 cm tall object that is 4 cm from the lens. The focal length is 3 cm. What type of vision are they used to correct? Give both names. How do they do this? Explain.6. If you open your eyes underwater, you do not get a well-focused image on your retina. But if you wear goggles or a mask, you will see normally. Explain why this is the case.