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Lens power, axial length related in emmetropia, ametropia

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MUNICH, Germany — A good correlation between lens power and axial length is necessary to achieve emmetropia, a study here found.

Researchers studied 66 healthy subjects to determine the influence the cornea, lens power and axial length have on each other. As they expected, the researchers found a good correlation between refraction and axial length. Lens power was independent of refraction, but in emmetropic eyes, a good correlation between lens power and axial length could be found. Higher axial length was related to lower values of lens power and vice versa, the researchers added.

Axial length deviation “seems to be compensated by lens power and if this mechanism does not function, ametropia results,” they wrote in the September issue of Der Ophthalmologe.