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n. The condition of the normal eye when parallel rays are focused exactly on the retina and vision is perfect.

n. The condition of perfect vision, where images are correctly brought to a focus on the retina.

n. That refractive condition of the eye in which the rays of light are all brought accurately and without undue effort to a focus upon the retina; -- opposed to hypermetropia, myopia, and astigmatism.

n. Normal power of accommodation, in which the light from a luminous point at any distance from the eye not less than 10 or 12 centimeters (3.9 or 4.7 inches) can be focused to a point on the retina. Also emmetropy.

n. (ophthalmology) the normal refractive condition of the eye in which there is clear focus of light on the retina

"William Boothe Dallas diplopia - Double vision or seeing double usually with both eyes open as in binocular diplopia, but can be with only one eye as in monocular diplopia. emmetropia - Perfect distance vision without the need of glasses. endophthalmitis - An inflammation within the eye."

hypermetropia    myopia    astigmatism   

physiological state    physical condition    physiological condition   

astigmatism    hyperopia    myopia   

emmetrope    emmetropic