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What happens to the image distance in the eye when we increase the distance of an object from the eye?
Formation of the image on the retina in our eye$\rightarrow$
The image distance in the eye remains the same when we increase the distance of an object from the eye. It is because, for a normal eye, the image distance is fixed which is equal to the distance of the retina from the eye lens.
Power of the accomodation$\rightarrow$
When we increase the distance of the object from the eye, the focal length of the eye lens is changed on account of the accommodating power of the eye so as to keep the image distance constant and the image is formed at the retina in each case. Thus, the image distance remains the same even on increasing the distance of the object from the eye. Thus, due to its power of accommodation, our eye is able to change the focal lengths of its lens so that the image is always formed at the retina.
Therefore, there is no change in the image distance in the eye when we increase the distance of an object from the eye.
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