1. What is meant by accomodation of eye and how it is achieved ?
2. What is meant by Persistence of vision and where this property is used ?
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Answer:
1. In medicine, the ability of the eye to change its focus from distant to near objects (and vice versa). This process is achieved by the lens changing its shape. Accommodation is the adjustment of the optics of the eye to keep an object in focus on the retina as its distance from the eye varies.
2. The image of any object seen persists on the retina for 1/16 second, even after the removal of the object. This continuance of sensation of eye for some time is called persistence of vision. The property of persistence of vision is used in cinematography.
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Answer:
(1).Accommodation: In medicine, the ability of the eye to change its focus from distant to near objects (and vice versa). This process is achieved by the lens changing its shape. Accommodation is the adjustment of the optics of the eye to keep an object in focus on the retina as its distance from the eye varies.
(2).The image produced in the human eye is retained for a very short period of time after the object is removed. This phenomenon is called persistence of vision. ... This means that when you are shown still pictures of a moving object at a rate faster than 16 pictures per second, the object will appear to be moving
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