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A person can see an object in proper focus only if the object is no further...

A person can see an object in proper focus only if the object is no further than 30cm from the right eye, and 50cm from the left eye. Write a prescription for the refractive powers R in diopters for the person’s corrective lenses for each eye, assuming that the individual wishes to clearly see objects all the way out to an infinite distance.

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